CELLS & TISSUES
Basic units of all living things—from bacteria to plants to animals, including human beings.
CELLS
Forming the physical foundation of the body, it composed of 206 bones that vary in size and shape and are connected by movable and immovable joints.
SKELETAL SYSTEM
A connection between two or more bones of the skeleton.
JOINT
The part of the muscle that does not move; attached closest to the skeleton.
ORGIN
Secretions, such as insulin, adrenaline, and estrogen, that stimulate functional activity or other secretions in the body. Influences the welfare of the entire body.
HORMONES
Dense, active protoplasm found in the center of the cell; plays an important part in cell reproduction and metabolism.
NUCLEUS
Body system consisting of the lungs and air passages; makes blood and oxygen available to body structures through respiration (breathing) and eliminating carbon dioxide.
RESPIRATORY SYSTEM
Skeleton of the head; divided into two parts: cranium and facial skeleton.
SKULL
The broad muscle that covers the top of the skull and consists of the occipitalis and frontalis.
EPICRANIUS
Also known as facial nerve; is the chief motor nerve of the face. Its divisions and their branches supply and control all the muscles of facial expression. It emerges near the lower part of the ear and extends to the muscles of the neck.
SEVENTH CRANIAL NERVE
The usual process of cell reproduction of human tissues that occurs when the cell divides into two identical cells called daughter cells.
MITOSIS
Forming the physical foundation of the body, it composed of 206 bones that vary in size and shape and are connected by movable and immovable joints.
TISSUE
Consists of the sternum, ribs, and thoracic vertebrae; elastic, bony cage that serves as a protective framework for the heart, lungs, and other internal organs.
THORAX
Muscle of the neck that lowers and rotates the head.
STERNOCLEIDOMASTOIDEUS
Also known as duct glands; they produce a substance that travels through small, tube-like ducts. Sweat glands and oil glands of the skin belong to this group.
EXOCRINE GLANDS
The protoplasm of a cell; the watery fluid that surrounds the nucleus of the cell and is needed for growth, reproduction, and self-repair.
CYTOPLASM
The body system that is responsible for breaking down foods into nutrients and wastes; consists of the mouth, stomach, intestines, salivary and gastric glands, and other organs.
DIGESTIVE (GASTROINTESTINAL)
Bones that form the prominence of the cheeks.
ZYGOMATIC BONES
Muscle that covers the bridge of the nose, lowers the eyebrows, and causes wrinkles across the bridge of the nose.
PROCERUS
The most complex organ of the endocrine system. This gland affects almost every physiologic process of the body: growth, blood pressure, contractions during childbirth, breast-milk production, sexual organ functions in both women and men, thyroid gland function, and the conversion of food into energy (metabolism).
PITUITARY GLAND
A colorless, jelly-like substance found inside cells in which food elements such as proteins, fats, carbohydrates, mineral salts, and water are present.
PROTOPLASM
Structures composed of specialized tissues designed to perform specific functions in plants and animals.
ORGANS
One of three bones that comprise the ankle joint. The other two bones are the tibia and fibula.
Muscles that draw a body part, such as a finger, arm, or toe, inward toward the median axis of the body or of an extremity.
ADDUCTORS
The system that takes deoxygenated blood from the heart to the lungs for oxygenation and waste removal and then returns that blood to the heart (left atrium) so oxygen-rich blood can be delivered to the body.
PULMONARY CIRCULATION