Sperm Cell Function: What Every Man Should Know

A sperm cell, also called spermatozoa, is a male reproductive cell produced in the testes after puberty. It is responsible for fertilizing a female egg during reproduction.

The sperm cell contains the genetic material from the male partner [1]. During fertilization it combines this genetic material with an egg's DNA. This combination of two DNAs gives birth to a new life.

The main function of sperm during reproduction is to swim towards the egg and fertilize it. Without a healthy and functional sperm, a man is infertile, and he can't achieve conception.

This article is a detailed explanation of sperm cell function, what is in a sperm cell, and how sperm structure and function are related.

The Anatomy of a Sperm Cell

A spermatozoa apparently has a very simple anatomy, but the mechanism behind the function of a sperm cell is very complex.

But what does the sperm cell look like?

The sperm cell anatomy is divided into three main parts [2]. Sperm anatomy includes the head, the midpiece, and the tail. In the below diagram sperm cell, you can see the size sperm cell and the parts of sperm cell with labels.

Sperm Cell With Labels

Let’s explore each part of human spermatozoa define and discuss the function of spermatozoon for male fertility:

1. The Head of the Sperm Cell

The head is the most important structure in the sperm diagram. The head contains the genetic material, or DNA, of the male partner that is transferred to the offspring when fertilization occurs.

The head also contains a structure called the acrosome, a cap-like structure that contains enzymes [3]. The head of a sperm is mostly important for the penetration of sperm cells into the egg during fertilization.

2. The Midpiece of the Sperm Cell

The midpiece of sperm is the area of spermatozoa between the head and tail. In many diagrams of the sperm cell, you may find the midpiece area labeled as the tail.

However, the function of the midpiece is different from that of the tail. The midpiece of the sperm cell is packed with mitochondria which produces the energy needed for the sperm cell to move.

It provides the energy needed for the tail to propel the sperm cell toward the egg within the female reproductive tract.

3. The Tail of the Sperm Cell

The tail of the sperm cell is also called the flagellum [4]. It is the longest part of the sperm structure. The tail or flagellum acts like a propeller. It moves in a whip-like motion, and this motion pushes the sperm cell forward.

The tail gets the energy for movement through the midpiece. The availability of the energy and continuous movement of the tail makes it possible for the sperm to reach the egg.

What Is Sperm Cell Function?

Sperm cells have a single function to perform. They are designed to deliver the male's genetic material present in the sperm to the female's egg. This process is the first step in human reproduction.

We can divide this process into three parts to thoroughly understand different aspects of sperm cell function.

These are:

1. Carrying Genetic Material

During the process of sperm regeneration, also called spermatogenesis, a step comes where each sperm cells get a single copy of DNA. While other cells usually have a pair of DNA or 46 chromosomes, the sperm cells have a single copy of DNA or 23 chromosomes.

This copy of DNA contains all the characteristic information from the male partner. This includes heredity properties, such as strength, appearance, health, and diseases.

When the sperm reaches the egg and fertilization does occur, this single copy of DNA combines with the single copy of DNA in the egg. These single pairs combine to form a pair of DNA for the baby. This pair of DNA is the blueprint for the growth and development of the newborn baby.

2. Movement Towards the Egg

A man can’t conceive even if a sperm cell has completely healthy DNA, but it can’t swim towards the egg. This property of the sperm cell to be able to swim towards the egg is called motility [5].

Spermatozoa move with the help of tail movement. Once sperm is in the female reproductive tract, the tail pushes sperm forward towards the egg. The energy for this movement comes from the midpiece of the sperm structure, which contains mitochondria.

Studies show that sperm cells also have a sense of direction which helps them swim towards the egg [6]. This property is called chemotaxis and it assists in successful fertilzation.

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3. Fertilization of Egg

Fertilization is the process where sperm and egg cells combine together and make an embryo. This process occurs within the fallopian tubes, a structure in the female reproductive tract.

During intercourse, sperm cells are released in the vaginal canal. From there, sperm have to travel through the uterus into the fallopian tubes for fertlization.

When sperm comes in contact with the egg, it releases enzymes that penetrate the egg’s outer layer. After making the space, sperm enters into the cell, where its genetic material combines with with egg’s genetic material.

This process is called fertilization, and it is the beginning of a new life within the female reproductive tract.

How to Improve Spermatazoa Function?

Spermatazoa's health and function are not independent of any internal or external factors. Some prominent factors that can impact sperm cells are:

1. Diet and Nutrition

A healthy diet benefits all body functions, including sperm structure and function. Studies show that certain vitamins and minerals support the health and function of sperm cells [7].

They include vitamin A, C, E, and minerals such as zinc and selenium. Adding the above mentioned nutrients in your diet boosts sperm health and function. Incorporating fertility supplements with nutrients like zinc, selenium, and CoQ10 into your routine can enhance sperm motility and overall reproductive health, aiding in the journey toward conception.

2. Exercise

A 2023 study shows that regular moderate-intensity exercise can improve sperm quality and sperm function [8]. Exercise improves hormonal balance and increases blood circulation, which can support fertility.

However, it is important to be carefull about the type of exercise for sperm health. This is because some exercises can harm the reproductive organs and reduce sperm motility [9].

3. Stress and Psychological Health

Research shows that high stress levels and overall poor psychological health are negatively associated with fertility status [10]. Stress has a negative impact on hormone levels, affecting sperm production and function.

Releive your stress through adding productivity in your daily routine. Different stress management tips can also help.

4. Smoking and Alcohol Consumption

Smoking, excessive alcohol use, and other recreational drugs can reduce sperm count and impair sperm motility. Recreational drugs disrupt the nervous control over reproductive health and hormonal levels.

5. Environmental Toxins

A 2022 study shows that different environmental toxins, such as chemicals and heat exposure, can impair spermatozoa function [11]. Avoid or limit your exposure to such toxins for improved fertility and better chances of conception.

Key Takeaways on Sperm Cell Function

If you are unaware of what is the sperm cell or what a sperm means, spermatozoa meaning or sperm definition biology is “A form of reproductive cell in the male body.”  It is responsible for initiating fertilization and transferring genetic information from the father to the offspring.

The testes are a male reproductive organ that produces this reproductive cell. After intercourse, the man sperm travels within the female body to reach the egg cell in the fallopian tubes. The next function of the sperm cell after reaching the egg is to initiate fertilization.

Those trying to conceive might want to improve sperm quality and function. Different lifestyle choices, such as a healthy diet and physical activity, are practical ways to enhance sperm cell function. For those concerned about their sperm quality, understanding where to get fertility test can be an important step toward assessing and improving reproductive health.

FAQs

1. What is the definition of sperm?

Many people are unaware of the simple answer of what is sperm cell. Spermatozoa is defined as the male reproductive cell that initiates the fertilization process. It contains the genetic material of the male partner for the offspring.

2. What are different sperm types?

Normal and abnormal spermatozoa are two main types of sperm cells based on the shape and size of sperm cells. The shape and size of abnormal sperm make them unable to reach and fertilize an egg.

3. Is sperm a living thing?

People often find themselves asking are sperm living organisms out of curiosity. Yes, male sperms are the living cells and have the ability to move and consume energy.

Resources Used

1. Küçük, N. (2017). Sperm DNA and detection of DNA fragmentations in sperm. Turkish Journal of Urology, 44(1), 1-5. https://doi.org/10.5152/tud.2018.49321
2. Alberts, B., Johnson, A., Lewis, J., et al. (2002). Molecular biology of the cell (4th ed.). Garland Science. Sperm. https://www.ncbi.nlm.nih.gov/books/NBK26914/ 
3. Khawar, M. B., Gao, H., & Li, W. (2019). Mechanism of Acrosome Biogenesis in Mammals. Frontiers in Cell and Developmental Biology, 7. https://doi.org/10.3389/fcell.2019.00195 
4. Vyklicka, L., & Lishko, P. V. (2020). Dissecting the signaling pathways involved in the function of sperm flagellum. Current Opinion in Cell Biology, 63, 154. https://doi.org/10.1016/j.ceb.2020.01.015 
5. Dcunha, R., Hussein, R. S., Ananda, H., Kumari, S., Adiga, S. K., Kannan, N., Zhao, Y., & Kalthur, G. (2021). Current Insights and Latest Updates in Sperm Motility and Associated Applications in Assisted Reproduction. Reproductive Sciences, 29(1), 7-25. https://doi.org/10.1007/s43032-020-00408-y
6. Teves, M. E., Guidobaldi, H. A., Uñates, D. R., Sanchez, R., Miska, W., Publicover, S. J., Morales Garcia, A. A., & Giojalas, L. C. (2009). Molecular Mechanism for Human Sperm Chemotaxis Mediated by Progesterone. PLoS ONE, 4(12). https://doi.org/10.1371/journal.pone.0008211 
7. What Vitamins Should A Man Take When Trying To Conceive. Conceive Plus®. https://conceiveplus.com/blogs/blog/what-vitamins-should-a-man-take-when-trying-to-conceive 
8. Belladelli, F., Basran, S., & Eisenberg, M. L. (2023). Male Fertility and Physical Exercise. The World Journal of Men's Health, 41(3), 482-488. https://doi.org/10.5534/wjmh.220199 
9. Jóźków, P., & Rossato, M. (2017). The Impact of Intense Exercise on Semen Quality. American Journal of Men's Health, 11(3), 654-662. https://doi.org/10.1177/1557988316669045 
10. Ilacqua, A., Izzo, G., Emerenziani, G. P., Baldari, C., & Aversa, A. (2018). Lifestyle and fertility: The influence of stress and quality of life on male fertility. Reproductive Biology and Endocrinology : RB&E, 16. https://doi.org/10.1186/s12958-018-0436-9 
11. Krzastek, S. C., Farhi, J., Gray, M., & Smith, R. P. (2020). Impact of environmental toxin exposure on male fertility potential. Translational Andrology and Urology, 9(6), 2797-2813. https://doi.org/10.21037/tau-20-685