Chapter 46 - Animal Reproduction

Internal fertilization

Internal fertilization

________ is frequently connected with fewer offspring and stronger parental protection of offspring.

Contraception

________ may prevent mature gametes from being released from the gonads, as well as fertilization.

human female reproductive system

The ________ is made up mostly of the labia and the glans of the clitoris on the outside and the vagina, uterus, oviducts, and ovaries on the inside.

Ducts

________ connect the testes to the penis and internal accessory glands.

Sperm

________ is generated in the testes, which are suspended outside the body in the scrotum in men.

endometrial lining

The ________ is reabsorbed throughout estrous cycles, and sexual receptivity is restricted to a heat phase.

anterior pituitary

In animals, GnRH from the brain controls the release of two hormones from the ________, FSH and LH.

meiosis

By ________, the animal that develops from a zygote can give rise to gametes.

sexual reproduction

Both asexual and ________ are frequent in animals.

Hormones

________ are also secreted by the growing follicle and the corpus luteum, which aid in the coordination of the uterine and ovarian cycles via positive and negative feedback.

generation of progeny

The ________ without gamete fusion is referred to as asexual reproduction.

Human oogenesis

________ is discontinuous and cyclic, with one egg produced each meiosis.

Asexual reproduction

________ produces new people without the union of egg and sperm.

Fertilization

________ can take place externally when both sperm and eggs are discharged outside the body, or internally when sperm implanted by the male ________ an egg in the female reproductive system.

Animal reproduction

________ may be classified into two types: sexual and asexual.

zygote

The ________ is formed by the union of haploid gametes during sexual reproduction.

FSH

________ and LH regulate androgen (mostly testosterone) secretion and sperm production in males.

Gamete production

________ and delivery systems range from undifferentiated cells in the body cavity to sophisticated systems that include gonads that generate gametes as well as auxiliary tubes and glands that protect or transport gametes and embryos.

Human spermatogenesis

________ is continuous and results in the production of four sperm each meiosis.

Sexual reproduction

________ necessitates the union of male and female gametes, resulting in the formation of a diploid zygote.