# data[].attributes.body
A kidney regulates ion conecntration( sodium, potassium, calcium) and prevents them from reaching toxic levels.

It aids in the production of hormones, like renin which controls salt, water balance and blood preassure.

They are involved in regulating plasma calcium and glucose levels, which keep the body healthy.

Another function is the excretion of wastes and toxins, since they filter out a variety of water solvable waste products into the urine for excretion.

# data[].attributes.body
Heart is divided into 4 chambers: 2 atria and 2 ventricle. The right side contains deoxygenated blood while the left side contains oxygenated blood.
The arteries are muscular, strong and have thick walls because they take away blood from the heart under high pressure
The veins are thinner because they transport blood to the heart under low pressure

# data[].attributes.body
Limbs are the arms and legs that are connected to torso or trunk.
Animals use limbs for locomotion (movement)such as walking, running on all four limbs.
The upper limbs and lower limbs were evolved basically for bearing the weight of the body and locomotion.
The lower limbs have been restrained by the necessity of maintaining strength and stability.

# data[].attributes.body
- the brain is protected by the skull in all vertebrates.
- it is composed of 3 main parts in mammals: the cerebrum, cerebellum and brainstem.
- cerebrum (or cerebral cortex)
- mainly controls the hands
- cerebellum
- coordinates the muscles of the body
- brainstem
- is connected to the spinal chord and controls heartbeat