The Hierarchy of Organization in the Human Body: Cells to Tissues to Organ Systems

The Digestive System

Organ system which both chemically and mechanically break down food to release nutrients molecules for our body to absorb and use

Organs

Pharynx

Mouth

Salvary Glands

Esophagus

Liver

Stomach

Pancreas

Small Intestine

Large Intestine

Appenxdix

Rectum

Anus

Stages

When you eat, you swallow and your tongue pushes the food into your throat.

Once you begin swallowing, the food begins to move down your esophagus

Food enters your stomach, the stomach muscles mix the food and liquid then slowly empties its liquids, called chyme

The food then eneters the small intestine. The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward.

Moving into the large intestine, the large intestine absorbs water and changes the waste from liquid into stool

To food moves down to the rectum, stores stool until it pushes stool out of your anus

Elimination

Leftover waste is removed from the body

Absorption

Nutrients move into the bloodstream

Digestion

Breaks food down into useful nutrients

Digestion

The Circulatory System

the system that transports oxygen and nutrients throughout the body and carries away wastes

Stages

The heart pumps blood

The blood travels to large arteries

Organs

The Respiratory System

Organ system provides oxygen for the body and allows carbon dioxide to leave the body

Stages

Air first begins to enter our body from our Moth and nose

Passes through the pharynx

Travels down the trachea

Trachea divides into 2 bronchus' known as the bronchi

Trachea Support

Organs

Lungs

Trachea

Mouth

Pharynx

Nose/Nasal Cavity

Bronchi

Trachea is supported by many rings of cartilage. The cartilage keeps the trachea open to allow air to flow freely. It is a special type of connective tissue with specialized cells mixed in a mix of strong and flexible fibers

Then travels to the small vessels

Blood exchanges many substance with the surrounding tissues

Blood flows into the veins

Blood returns back into the heart, process repeats

Blood Vessels

Types

Arteries

Carry blood away from the heart

Veins

Carry blood away from the heart

Capillaries

Tiny blood vessels with very thin walls which allow substances to diffuse between the blood and other body fluids and tissues

Blood

Types Of Blood Cells

Red Blood Cells

Contains a protein called hemoglobin, which
allows them to transport oxygen throughout the body

White Blood Cells

These are infection-fighting cells in the blood which recognize and destroy invading bacteria and viruses

Platelets Cells

Tiny cells that help in blood clotting

Type Of Protein

Plasma

A protein-rich liquid that carries the blood cells along and makes up over half of blood’s volume.

Heart

Made Up Of Tissues

Cardiac Muscle Tissue

Makes the heart contract and moves the blood around the body

Nerve Tissue

Connective Tissue