33 results found

Search Results for: contracts

Antagonistic Muscle

Definition of Antagonistic Muscle What does the term “antagonistic” mean? As the name suggests, the word antagonistic... Read More

Agonist

What is an Agonist? In biology, an "agonist" is the "doer of an action". Opposite of it is the antagonist, which opposes... Read More

Ganglion

Ganglia Definition What are ganglia? To simply define ganglia in biology, it is the structure of an oval shape that... Read More

Smooth muscle

The smooth muscle can be described as a type of muscle in the human body that is non-striated and involuntary in action.... Read More

Ganglia

Ganglia Definition What are ganglia? To simply define ganglia in biology, it is the structure of an oval shape that... Read More

Semilunar valve

The human heart structure consists of heart chambers (2 atria and 2 ventricles) that differ functionally from each other.... Read More

Patellar reflex

Definition noun, plural: patellar reflexes A stretch reflex wherein the anterior muscles of the thigh contracts by reflex as... Read More

Pulse

pulse (Science: cardiology, physiology) The impulse transmitted to arteries by contraction of the left ventricle of the... Read More

Ventricular syncytium

Definition noun A network of cardiac muscle cells connected by gap junctions that allows coordinate contraction of the... Read More

Atrial syncytium

Definition noun A network of cardiac muscle cells connected by gap junctions that allows coordinate contraction of the... Read More

Thyropharyngeus

Definition noun (anatomy) The superior muscle arising from the thyroid cartilage, and, together with cricopharyngeus,... Read More

Involuntary muscle

A muscle act typically either under the control of the will or without conscious control. Muscles that can be controlled at... Read More

Refractory Period

(neurology) the time after a neuron fires or a muscle fiber contracts during which a stimulus will not evoke a response.The... Read More

Agonist muscle

Definition noun A muscle that contracts while another muscle relaxes Supplement Muscles may be classified according to the... Read More

Roots

Upon seed germination, the embryo root, called the radicle, grows and develops into the first root. The radicle may thicken... Read More

Circulation

Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More

Respiration

Organization of the Respiratory System Each lung is composed of air sacs called alveoli - the sites of gas exchange with... Read More

Peristalsis

What is Peristalsis? Peristalsis is the series of involuntary, wave-like muscle movements in the cylindrical, hollow tube... Read More

Labour

Labour (Science: obstetrics) The act of giving Birth to a baby. There are four stages: The first stage lasts from the onset... Read More

Myocardium

Myocardium Definition What is the myocardium of the heart?  It is the muscular middle layer of the heart that is... Read More

Stretch reflex

Definition noun A reflex contraction of a muscle when the muscle proprioceptors (e.g. muscle spindles) are... Read More

Margin

Margin 1. A border; edge; brink; verge; as, the margin of a river or lake. 2. Specifically: The part of a page at the edge... Read More

Cytokinesis

The cell cycle of eukaryotes is a cyclical series of biological events that certain asexual cells go through. The cell cycle... Read More

Contractile vacuole

Definition noun, plural: contractile vacuoles (cell biology) A specialized vacuole of eukaryote cells, especially protozoa,... Read More

Valva trunci pulmonalis

valva trunci pulmonalis --> pulmonary valve (Science: anatomy, cardiology) The heart valve that divides the right... Read More

Ventilation

Ventilation Definition Often when persons think of ventilation, they think of getting clean or enough air into a room. This... Read More

Isotonic

Isotonic Definition What does isotonic mean? The term "isotonic" is used in physiology, anatomy, and physical chemistry.... Read More

Skeleton

skeleton (Science: anatomy) A solid or fluid system which allows muscles to relax after contracting (in general, because... Read More

Blood vessel

Definition noun, plural: blood vessels Any of the vessels in cardiovascular system and functions by carrying blood... Read More

Encystment

Encystment 1. (Science: biology) a process which, among some of the lower forms of life, precedes reproduction by budding,... Read More

Bile

Have you ever wondered how the fats from butter, cheesy burgers, and pizzas get digested in your body? Or have you heard of... Read More

Tissue

Tissue Definition What is tissue in the body? The body tissue is an aggregation of cells that function together and have a... Read More

Human Reproduction

Terminology and Concepts Primary reproductive organs are called gonads - testes in the male and ovaries in the female.... Read More