Vocabulary

Vocabulary
Words You Need to Know

Tissue: A tissue is a group of similar cells that work together to perform a specific task. 
An example of tissue is connective tissue, which supports other tissues and binds them together.

Organ: An organ is a structure that is made up of two or more similar tissues that work together to perform a specific function.
An example of an organ is the heart, which pumps blood around the body.

Organ System: An organ system is a group of organs that work together to perform a particular function. 
An example of an organ system is the skeletal system, which is the internal frame that helps support our bodies.

Skeletal System: The skeletal system is made up of bones, cartilage, and connective tissue that holds your bones together; the hard structure that provides a frame for the body of an animal.
An example of the skeletal system is the skull, the combined structure of many bones that protect the brain.

Joint: A joint is a place where two more bones meet. 
An example of a joint is a fibrous joint, which is immovable and held together by a ligament.

Ligament: A ligament is a strong, elastic band of connective tissue.

An example of a ligament is a nuchal ligament, which holds the head and neck in a normal posture without muscular effort.

Muscular System: The muscular system is made up of muscles that let you move; the muscular system is the set of organs that are able to create skeletal movement.

Some examples of the muscular system are the smooth and cardiac muscles that help us to move our bodies.

Tendon: A tendon is a strand of tough connective tissue that connects your skeletal muscles to your bones.

An example of a tendon is the quadriceps tendon, which connects the front thigh muscles to the kneecap.

Voluntary: Voluntary is a muscle action under your control. 
An example of voluntary movement is the skeletal muscle, which moves voluntary or is under your control.

Involuntary: Involuntary is a muscle action not under your control.
An example of involuntary movement is the smooth muscle, which moves involuntary or is not under your control.

Circulatory System: The body system that is made up of your heart, blood vessels, and blood that circulates blood throughout the body, delivers needed materials to cells, and removes waster products; also known as the cardiovascular system.

Examples of the circulatory system are the veins and the heart in your body, which help to pump blood around the body and maintain homeostasis.

Artery: An artery is a blood vessel that carries blood away from the heart.

An example of an artery is the aorta artery, which takes blood from the left ventricle and distributes it to the rest of the body.

Vein: A vein is a blood vessel that carries blood back to the heart.

An example of a vein is the pulmonary veins, which carry relatively oxygenated blood from the lungs to the heart.

Capillary: A capillary is a tiny blood vessel that allows exchanges between body cells and blood.

An example of a capillary is sinusoidal capillary, which allow red blood cells and proteins in through the endothelial walls.