Reproductive System - Zoology Lecture

Flashcards covering key vocabulary and concepts from the lecture on the reproductive system in zoology.

Asexual Reproduction

The creation of offspring without the fusion of egg and sperm.

Sexual Reproduction

The creation of an offspring by fusion of a male gamete (sperm) and female gamete (egg) to form a zygote.

Budding

A simple form of asexual reproduction found only among invertebrates.

Fission

Asexual reproduction in many invertebrates involving separation of a parent into two or more individuals of about the same size.

Fragmentation

Breaking of the body into pieces, some or all of which develop into adults, must be accompanied by regeneration.

Parthenogenesis

The development of a new individual from an unfertilized egg, mainly observed in invertebrates.

Hermaphroditism

Condition where each individual has male and female reproductive systems.

External Fertilization

Eggs shed by the female are fertilized by sperm in the external environment.

Internal Fertilization

Sperm are deposited in or near the female reproductive tract, and fertilization occurs within the tract.

Gonads

Organs that produce gametes.

Cloaca

A common opening between the external environment and the digestive, excretory, and reproductive systems.

Testes

Male gonads that produce sperm and hormones.

Ovaries

Female gonads that contain many follicles consisting of oocytes surrounded by support cells.

Spermatogenesis

The formation of sperm, which is continuous and prolific.

Oogenesis

The development of a mature egg, which is a prolonged process.

Follicular Phase

Phase characterized by follicle growth and increase in estradiol; ends at ovulation.

Luteal Phase

Phase where follicular tissue transforms into a corpus luteum that secretes progesterone and estradiol.