Human Reproductive System: Sperm Production

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Approximately how many sperm are produced by a man during his lifetime?

525 billion (correct)

100 billion

2 trillion

1 trillion

What percentage of semen is composed of sperm?

50%

20%

5-10% (correct)

1%

How long approximately is each epididymis tube?

20 feet (correct)

5 feet

1 foot

10 feet

How long does it take for a sperm to mature?

2 months Signup and view all the answers

What are the tubules called where sperm are manufactured?

Seminiferous tubules Signup and view all the answers

What is the function of the epididymides?

To store sperm Signup and view all the answers

What is the term for the process of the fertilized egg dividing into two, then four cells, and so on?

Cleavage Signup and view all the answers

How many cells does the morula typically consist of?

16-32 cells Signup and view all the answers

What is the term for the process by which the blastocyst burrows into the endometrium?

Implantation Signup and view all the answers

What is the purpose of the yolk sac?

To help transport nutrients to the embryo Signup and view all the answers

How many primary germ layers will develop from the embryonic disc?

Three Signup and view all the answers

What is the term for the fluid-filled sac that develops from the amniotic cavity?

Amniotic sac Signup and view all the answers

What are the three layers that the embryonic disc differentiates into?

Endoderm, Mesoderm, and Ectoderm Signup and view all the answers

By what week does the embryo have a distinct head and tail and a beating heart?

Week 4 Signup and view all the answers

What is the name of the groove or hollow space between the nose and upper lip?

Philtrum Signup and view all the answers

By what week is the embryo considered a fetus?

Week 10 Signup and view all the answers

What is developing on the fingers and toes of the fetus by 12 weeks?

Tiny nails Signup and view all the answers

What is the fine, downy hair that grows over the body of the fetus by 12 weeks?

Lanugo Signup and view all the answers

What is the main function of the Mitochondria in the midpiece of a sperm cell?

To provide the sperm cell with energy to move the tail Signup and view all the answers

What is the primary function of the ovaries in the female reproductive system?

To release eggs for fertilization Signup and view all the answers

What is the approximate size of the sperm head?

1/5000 inch Signup and view all the answers

What is the purpose of the Acrosome in the sperm head?

To contain enzymes for penetrating the female egg Signup and view all the answers

Where are the female reproductive organs located?

Entirely inside the body Signup and view all the answers

How often do females release eggs for fertilization?

Once a month Signup and view all the answers

What happens to the fetus's appearance during the seventh to eighth month?

It accumulates fat and becomes chubby Signup and view all the answers

What is the approximate duration of each trimester?

Three calendar months Signup and view all the answers

What is the function of the placenta?

To provide oxygen and nutrients to the fetus and remove waste products Signup and view all the answers