Body Systems

Skeletal System:

Organs: bones, tendons, cartilage, ligaments, joints, and marrow

Functions: movement, support, shape, protection, produces blood cells, stores and releases materials

Muscular System:

Organs: Muscles (Smooth Muscles: involuntary; muscle, movement, Cardiac Muscles: involuntary; (we don’t tell out heart to beat, it just does) found in heart, Skeletal Muscles: voluntary; muscles attached to the bones through connected tissues)

Functions: movement, support, protection, heat generation, blood circulation

Nervous System:

Organs:

CNS (Central Nervous System): brain, spinal cord, interneurons (passes info), controls body + mind

PNS (Peripheral Nervous System): nerves (bundles of neurons), sensory (gathers info), motor (send response and respond) [controls voluntary and involuntary reactions]

Functions: receiving info, responding to stimuli (info) maintaining homeostasis [regulating the body. ex: blood pressure, heart rate, breathing, body temp, digestion]

Circulatory:

Organs: Heart, blood vessels

Main Blood Vessels:

Blood: transports all materials (plasma, red and white blood cells, platelets)

  1. Arteries: carries blood away from heart to capillaries

  2. Capillaries, which is the oxygen and carbon dioxide exchange, and brings it to veins

  3. Veins, which bring the blood back to the heart.

Functions: delivers oxygen + other nutrients, removes CO2 + other waste, regulates body temp., transports hormones, fights diseases

Respiratory:

Organs: lungs, larynx, trachea, bronchi, nose, alveoli, mouth

Functions: breathing, gas exchange (O2 and CO2), helps to smell, sound production, and filters particles (blood too)