A chamber of the heart that receives blood from the veins and forces it into a ventricle.
What is the atrium?
A bone fracture that causes little or no damage to surrounding tissue and does not break the skin.
What is a simple fracture?
A substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
What is an enzyme?
The complex of nerve tissues that controls the activities of the body. In vertebrates, it comprises the brain and spinal cord.
What is the central nervous system?
The organ in the lower body of a woman or female mammal where offspring are conceived and in which they gestate before birth; the womb.
What is a uterus?
The membrane enclosing the heart, consisting of an outer fibrous layer and an inner double layer of serous membrane.
What is the pericardium?
The part of the skeleton that consists of the bones of the head and trunk of a vertebrate.
What is the axial skeleton?
Small, finger-like projections that extend into the lumen of the small intestine to increase surface area for absorption.
What are villi?
A gland located at the base of the brain that secretes hormones regulating growth and development.
What is the pituitary gland?
Tissue specialized for the storage of fat.
What is adipose tissue?
Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.
What are alveoli?
The point of attachment of a muscle to the bone or body part that it moves.
What is an insertion?
A flap of cartilage at the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.
What is the epiglottis?
Nerve fibers that carry sensory information toward the central nervous system.
What is a sensory nerve fiber?
A flexible cord containing blood vessels and attaching a human or other mammalian fetus to the placenta during gestation.
What us an umbilical cord?
A large membranous tube reinforced by rings of cartilage, conveying air to and from the lungs; the windpipe.
What is the trachea?
A muscle that is connected to the skeleton to form part of the mechanical system that moves the limbs and other parts of the body.
What is a skeletal muscle?
Three sections of the small intestine.
What are the Duodenum, Jejunum and the Ileum?
A large ductless gland in the neck that secretes hormones regulating growth and development through the rate of metabolism.
What is the thyroid gland?
Either of two small masses of lymphoid tissue in the throat, one on each side of the root of the tongue.
What are tonsils?
Either of the two main branches of the trachea that lead into the lungs.
What is a bronchus?
The series of vertebrae extending from the skull to the lower back, enclosing the spinal cord and providing support for the thorax and abdomen; the spine.
What is the vertebral column?
The involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wave-like movements that push the contents forward.
What is peristalsis?
Groups of pancreatic cells secreting insulin and glucagon
What are the Islets of Langerhans?
Cells in the blood that carry oxygen from the lungs to the rest of the body and carbon dioxide back to the lungs to be exhaled
What are red blood cells?