Reproduction

Animals that lay eggs are called oviparous animals. They include birds, reptiles, amphibians, fish, and insects.

Animals that give birth to live young are called viviparous animals. Examples include cats, dogs, humans, and cows.

The series of changes in form or structure of an animal during its life cycle from the embryo stage to the adult stage is known as metamorphosis.

A tadpole is the larval stage of a frog, characterized by a tail, gills for breathing underwater, and a different appearance from an adult frog.

Incubation is the process where eggs are kept warm, usually by a parent, to help the embryos develop inside.

The moment a sperm cell from the father unites with an egg cell from the mother, forming a single cell.

A ball of cells that develops from the fertilized egg and is the first stage of a new human being.

The process where the embryo adheres to the inner lining of the uterus. This marks the beginning of pregnancy.

The process where specialized cells group together to form tissues, organs, and organ systems within the developing embryo.

The period of time from fertilization to birth, typically lasting about 40 weeks or 280 days.

Fertilization that happens outside the body of an organism, typically in aquatic environments.

Fertilization that happens inside the body of an organism, usually in terrestrial animals.

The process in which an egg is released from an ovary.

The tube that connects the ovary to the uterus, where fertilization occurs.

The muscular organ that supports the developing embryo and fetus.

The passage leading from the uterus to the outside of the body, where sperm enters and a baby exits.

Tiny cells produced by the male reproductive system that contain half the genetic material needed for fertilization.

The female sex cell that contains half the genetic material needed for fertilization.

The ovaries are the female reproductive organs that produce eggs (ova) and female sex hormones like estrogen and progesterone. They are located in the abdominal cavity, one on each side of the uterus.

The fallopian tubes, also known as oviducts, are narrow tubes that connect the ovaries to the uterus. They have a funnel-shaped end near the ovary, which helps capture the released egg, and the other end opens into the uterus.

The uterus, also known as the womb, is a hollow, pear-shaped organ located between the bladder and the rectum. It's where a fertilized egg implants and grows into a fetus.

The cervix is the lower, narrow opening of the uterus that connects to the vagina. It acts as a barrier protecting the uterus from external infections and allows for the passage of sperm during intercourse.

The vagina is a muscular tube that connects the uterus to the outside of the body. It serves as a passageway for menstrual flow, sperm during intercourse, and for childbirth.

Epididymis is a coiled tube located on the back of each testicle. It stores and matures sperm cells before they are transported to the sperm duct.

Testosterone is the primary male sex hormone, produced by the testes. It plays a crucial role in the development of male sexual characteristics such as beard growth, muscle development, and a deep voice.