The organs that produce gametes​.

The study of the structure of an organism’s body parts.

The study of the functions of an organism's body parts.

If you stopped breathing, this cellular process would be unable to occur.

Nerve cells that carry electrical signals from one part of the body to another.​

Moves to cover the entrance to the trachea.

The central communication conduit between the brain and the body.

The immune system fights against these disease-causing agents.

A cell having a single set of unpaired chromosomes, for example a sperm cell.

The tendency to maintain a constant internal environment.

Regulates oxygen consumption, metabolism, blood calcium levels, and body temperature through the release of hormones.

Regulates blood glucose levels through the secretion of hormones into the digestive system.

The process by which diploid cells divide via meiosis to produce haploid sperm cells.

A part of the external barriers of our immune system at the cellular level, they sweep particles around the cell outward until they can be expelled.

Helps the body return to homeostasis from a dangerous external or internal threat.

The organ where pathogens are attacked by lymphocytes.

Brings air into the lungs​

The alternation of inhalation (in) and exhalation (out) of air from your lungs.

This type of macromolecule is broken down through chemical digestion in your mouth by the enzyme amylase.

A type of white blood cell that is part of the immune system

The protective layer of connective tissues surrounding the central nervous system.

The human digestive system is a long tube with specialized organs, more generally called this.

Red blood cells transport oxygen throughout the body using this.

Neurons have a long extension from their cell body, called this.

Chemical signals produced by endocrine tissue that are transported by the bloodstream