Bodily systems and means of reproduction (non-human)

In preparation for science topic test 3

Respiratory system

The bodily network responsible for taking in oxygen from the air and releasing carbon dioxide waste back into the environment

Circulatory system

The network of organs and vessels responsible for transporting oxygen, nutrients, hormones, and cellular waste throughout the entire body

Alveoli

Microscopic, thin-walled air sacs in the lungs where gas exchange occurs with surrounding blood capillaries

Trachea

A cartilaginous tube that conducts air from the larynx to the bronchi

Pharynx

A membrane-lined cavity behind the nose and mouth that connects them to the larynx and esophagus, serving as a passageway for both air and food (commonly known as the throat)

Larynx

An organ housing the vocal chords that connects the pharynx to the trachea and guards the entrance to the lower respiratory tract.

Epiglottis

A leaf-shaped flap of cartilage located behind the tongue that covers the entrance of the larynx during swallowing to prevent food from entering the airway

Esophagus

A muscular tube that connects the pharynx to the stomach, propelling food and liquid via wave-like contractions (peristalsis)

Heart

A muscular organ that pumps blood throughout the body via rhythmic contractions

Arteries

Blood vessels that primarily carry oxygen-rich blood away from the heart to body tissues, with the exception of pulmonary, which carries oxygen poor blood to the heart

Veins

Blood vessels that carry oxygen-depleted blood back toward the heart

Capillaries

Microscopic vessels where the exchange of gases, nutrients, and wastes occurs between blood and body tissues