A cell is the smallest structural and functional unit of an organism.

The difference between plant and animal cells is that plant cells have an organelle called chloroplast. Chloroplastscontain a pigment called chlorophyll (which gives the plant its green color).

A muscle is a band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body.

Muscle Tissue

A nerve is a whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord.

Nerve Tissue

A bone is the hard connective tissue forming the substance of the skeleton of most vertebrates, composed of a collagen-rich organic matrix impregnated with calcium, phosphate, and other minerals.

Bone Tissue

The bronchi conduct air into the lungs.

Bronchi Tissue

Your larynx controls pitch and volume and contains your vocal cords.

Larynx Tissue

Your digestive system is the system by which ingested food is acted upon by physical and chemical means to provide the body with absorbable nutrients and to excrete waste products.

Your circulatory system is the system that circulates blood and lymph through the body, consisting of the heart, blood vessels, blood, lymph, and the lymphatic vessels and glands. Also called cardiovascular system.

Your respiratory system is the system of organs in the body responsible for the intake of oxygen and the expiration of carbon dioxide.

Unlike other organisms paramecium's are one cell organisms. Within their one cell bodies they contain all of the things they need to survive.