oxygen

symbol = o2

oxygen

A chemical element with the symbol O2, oxygen is essential for respiration in most living organisms and is a key component of water.

mitochondria

Organelles in cells that generate energy through the process of cellular respiration, utilizing oxygen to convert nutrients into ATP.

arteries

Blood vessels that carry oxygen-rich blood away from the heart to the tissues of the body.

veins

Blood vessels that carry de-oxygen blood back to the heart from the tissues of the body.

capillaries

Small blood vessels that connect arteries and veins, facilitating the exchange of oxygen, nutrients, and waste products between blood and tissues.

Left Atrium

Receives oxygen-rich blood cells from the lungs.

right a atrium

Receives oxygen-poor blood cells from the body.

• Right Ventricle:

• Pumps oxygen-poor blood cells to the lungs.

• Left Ventricle

• Pumps oxygen-rich blood cells to the bo

artery

 Takes blood away from the heart.

Capillary

Connects arteries to veins; walls are one cell thick.