gen bio

28問 • 2年前

問題一覧

In humans, female and male reproductive systems work together to reproduce.

Reproductive system

is responsible for producing gametes (called eggs or ova), certain sex hormones, and maintaining fertilized eggs as they develop into mature fetuses and become ready for delivery.

Female Reproductive system

is to produce androgens such as testosterone that maintain male reproductive function and produce sperm cell (promote spermatogenesis) and transport into the female reproductive system for fertilization.

Male Reproductive System

Site of storage and development of oocytes

Ovary

Duct for transporting oocytes from ovary to uterus

Oviduct

The hollow chamber of which emberyo develops

Uterus

Lower part of the uterus that opens into vagina

Cervix

Organ of opens intercourse, produces lubricating fluids

Vagina

Organ of sexual arousal

Clitoris

are the two inner skin folds that surround the opening of the vagina. Their main function is to protect the vaginal and urethral openings from mechanical irritation, dryness, and infections.

Labia minora

literally, large lips) are relatively large, fleshy folds of tissue that enclose and protect the other external genital organs. The labia majora contain sweat and sebaceous glands, which produce lubricating secretions. During puberty, hair appears

Labia majora

Female reproductive system(front view)

Ovary, cervix, vagina, ovary, fallopian tube, uterus

Female reproductive system(side view)

Male reproductive system

Produce sperm cells

testes

Produces and stores sperm cells

Epididymis

Carries sperm from the epididymis to its junction with the urethra

Vas deferens

Secretes fructose into the semen, which provides energy for the sperm

seminal Vesicles

This refers to the fusion of the egg and sperm that results in the rormation or a zvgote.

Fertilization

The zygote undergoes a series of cell division without an increase in size. This ends with the formation of a blastul. called a bastocyst. which varies in structure among vertebrates.

Cleavage

The movement of the cells in this stage produces three primary germ layers: the endoderm, mesoderm, and ectoderm with different developmental fates Gastrulation patterns may differ depending on the amount of yolk present in the embro

Gastrulation

Cells from the three primary layers interact to form the organs of the body through a process called organogenesis. This is initiated with the formation of the notochord and the hollow dorsa nerve cord in the process called neuruation

Oraganogenesis

His size is 1/4 inches long. The heari, digestive system, back bone and spinal cord begin lo form. The placenta begins to develop and the embryo is 10,000 times larger that al the moment of conception.

1 month

By the end of the second month the embryo is 1 1/8 inches long. The heart is now formed and functioning. Eyes, longue, lips, nose, ears, and leeth are now forming. The embryo has movement even though the mother is not able to feel it

2 months

The embryo is about 3 inches long. Weighs about I oz. has a definite shape. nails start to dovelop, arms, iona losetha loes are fully formed. Now he

3 months

The baby's skin is pink, somewhat transparent and is covered with fine hair called lanugo. The felus is aboul 7 inches long and his weight is aboul 7 oz. Reflexes are bing developed, actions such as sucking and swallowing. Tooth buds are developing. Fingers and loes are well defined.

4 months

Fetus is about 10 inches long. Weighs about II oz. Infernal organs are maturing. Hair is growing on his head. Mother is now able to feel movement.

5 months

Baby is about 14 inches long. Weighs about 2 pounds. The baby's brain is developing rapidly. Eyelids are formed. And baby is able to hiccup.

6 months

Komunikasyon

Althea Dongallo · 37問 · 2年前

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