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
Homeostasis
Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More
Internal conjugate
Internal conjugate --> conjugate of pelvic inlet distance from the promontory of the sacrum to the upper posterior edge... Read More
Internal respiration
Internal respiration --> tissue respiration The interchange of gases between the blood and the tissues. Synonym: internal... Read More
Metamerism
Metamerism Definition Metamerism is the repetition of homologous body segments. This type of development can be seen in the... 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
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
Feedback mechanism
Feedback Mechanism Definition What is a feedback mechanism? A feedback mechanism is a physiological regulation system in a... Read More
Environment
Environment Definition What does environment mean? If you mean physical environment, then it is defined as the surrounding... 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
Eubacteria
Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single... Read More
Muscular system
Muscular System Definition What is the muscular system? The muscular system is a system that includes muscle cells and... Read More
Positive feedback
Positive Feedback Definition Each mechanism of the body like temperature, blood pressure, and levels of specific nutrients... 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
Animal Water Regulation
Homeostatic control, a set environment, and how evolution and natural selection drives a species to adapt to its environment... Read More
Hermaphrodite
We all know that typically living organisms are divided into two main categories of sex-based on their biological structure.... 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
Selectively-permeable membrane
Selectively Permeable Membrane Definition We can define selectively permeable membranes as those that are selectively... Read More
![Biology n., [baɪˈɑlədʒi] Definition: scientific study of life](https://www.biologyonline.com/wp-content/uploads/2021/12/biology-definition-and-branches-of-biology-300x168.jpg)
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
Morphology
Morphology Definition Morphology means the study of the shape and structure of living things from a biological perspective.... Read More
Triploblastic
Triploblastic Definition A triploblastic animal had three main layers of tissue during embryonic development. The central... Read More
External capsule
Definition noun (anatomy) A thin, white sheet of whiter matter fibers in the brain between the putamen and... Read More