238 results found

Search Results for: internal

Internal os

Definition noun The part of the cervical canal, forming an internal narrowing of the uterine cavity Supplement The cervix... Read More

Internal urethral sphincter

Definition noun The urethral sphincter made up of smooth muscle cells found at the inferior end of the urinary bladder and... Read More

Internal capsule

Definition noun (anatomy) A fan-like, 8-10 mm thick of white matter separating the caudate nucleus and the thalamus from the... Read More

Internal auditory canal

Definition noun A short, narrow passageway through the temporal bone of the skull where the vestibular nerve and cochlear... Read More

Internal acoustic meatus

Definition noun A short, narrow passageway through the temporal bone of the skull where the vestibular nerve and cochlear... Read More

Internal environment

Definition noun (1) The outside of the cells inside the body of an organism. (2) The extracellular fluid... Read More

Internal respiration

Internal respiration --> tissue respiration The interchange of gases between the blood and the tissues. Synonym: internal... Read More

Internal

Internal (Science: anatomy) Situated or occurring within or on the inside, many anatomical structures formerly called... Read More

Internal conjugate

Internal conjugate --> conjugate of pelvic inlet distance from the promontory of the sacrum to the upper posterior edge... Read More

Homeostasis

Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More

Stimulus

We can detect hot or cold environments using our sense of temperature. When the temperature is too hot, sweating... Read More

Metamerism

Metamerism Definition Metamerism is the repetition of homologous body segments. This type of development can be seen in the... 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

Homeostatic equilibrium

Definition noun (1) The tendency of an organism or a cell to regulate its internal conditions, usually by a system of... Read More

Environment

Environment Definition What does environment mean? If you mean physical environment, then it is defined as the surrounding... Read More

Eubacteria

Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single... Read More

Plasma membrane

Do all cells have a plasma (or cell) membrane? Yes, all cells have a biological membrane that separates the protoplasm from... Read More

Positive feedback

Positive Feedback Definition Each mechanism of the body like temperature, blood pressure, and levels of specific nutrients... Read More

Animal Water Regulation

Homeostatic control, a set environment, and how evolution and natural selection drives a species to adapt to its environment... Read More

Ear

Ear 1. The organ of hearing; the external ear. in man and the higher vertebrates, the organ of hearing is very complicated,... Read More

An introduction to Homeostasis

Researched and Written by Jonjo Minns Submitted to biologyonline.com on February 25, 2009. Published in biologyonline.com... Read More

Kidneys and Regulation of Water and Inorganic Ions

Renal Functions Kidneys remove/add substances from/to the plasma. Regulate water concentration, inorganic ion... Read More

System

A system pertains to interdependent or interrelated objects comprising and functioning as a whole. In biology, it may refer... 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

Arthropod

Arthropod Definition What is an arthropod? An arthropod is an invertebrate living organism characterized by the presence of... Read More

External os

Definition noun A small, somewhat circular aperture on the extremity of the extocervix Supplement At the lower part of the... Read More

External capsule

Definition noun (anatomy) A thin, white sheet of whiter matter fibers in the brain between the putamen and... 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

Zeitgeber

Definition noun, plural: zeitgebers An external or environmental cue that helps regulate biological clock that drives... Read More

Cell wall

The cell is the structural, functional, and biological unit of all organisms. It is a membrane-bound structure containing... Read More

Life

Life Definition noun, plural: lives (1) A distinctive characteristic of a living organism from dead organism or non-living... Read More

Sensory Systems

A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal and... Read More

Regulation of Organic Metabolism, Growth and Energy Balance

Organic Metabolism Events of Absorptive and Post-absorptive States. The absorptive state is the period during which... Read More

External urethral sphincter

Definition noun The urethral sphincter associated with the discharge of urine in both males and females, and where semen is... Read More

Primary succession

Primary succession definition Primary succession is an ecological succession where a newly formed area is colonized for the... Read More

Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More

Triploblastic

Triploblastic Definition A triploblastic animal had three main layers of tissue during embryonic development. The central... 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

Muscular system

Definition noun An organ system comprised of skeletal muscles, smooth muscles, and cardiac muscles that are responsible for... Read More

Endoskeleton

The internal skeleton; bony and cartilaginous structure (especially of vertebrates).A skeletal structure internal to an... Read More