127 results found

Search Results for: respiratory system

Respiratory system

Definition noun An organ system comprised of organs and structures associated for respiration or gas exchange Supplement An... 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

System

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

Erythrocyte

Definition noun, plural: erythrocytes A blood cell with hemoglobin-rich cytoplasm and whose main function is to transport... Read More

Circulation

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

Animal

Animal Definition An animal (plural: animals) refers to any of the eukaryotic multicellular organisms of the biological... Read More

Arthropod

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

Afferent Nerve

Afferent Nerve Definition The word ‘aferent’ means "steering or conducting something towards a destination". The... Read More

Opportunistic pathogen

Opportunistic Pathogen Definition How do we define opportunistic pathogen? The opportunistic pathogen is an infectious... Read More

Hyaline cartilage

Hyaline Cartilage Definition Before we define hyaline cartilage, let us understand what cartilage is. What is cartilage? Is... 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

Facultative anaerobe

Facultative Anaerobe Definition What does facultative anaerobe mean? Facultative organisms are the most adaptable... Read More

Diffusion

Diffusion Definition Diffusion is the net passive movement of molecules or particles from regions of higher to regions of... Read More

Respiratory metabolism

respiratory metabolism The exchange of respiratory gases in the lungs, oxidation of foodstuffs in the tissues, and... Read More

Breathing rate

Breathing rate (Science: chest medicine, clinical sign) also referred to as the respiratory rate. Measured as the number of... Read More

coronavirus COVID-19

Coronavirus Disease 2019 (COVID-19) Coronavirus Disease 2019 (COVID-19) is a contagious coronavirus disease first detected... Read More

Consciousness and Behavior

States of Consciousness Defined either by (1) behavior - ranging from attentive and alert to coma and (2) electrical... Read More

Respiratory substrate

Definition noun The substance required for cellular respiration to derive energy through... Read More

Pseudostratified columnar epithelium

Definition noun, plural: pseudostratified columnar epithelia A special type of columnar epithelium composed of a single... 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

Alveolar duct

Alveolar duct The part of the respiratory passages distal to the respiratory bronchiole; from it arise alveolar sacs and... Read More

Digestive system

Definition noun A system of organs in which the major function is to convert food into simpler, absorbable nutriments to... Read More

Red blood cell

Definition noun, plural: red blood cells The blood cell containing hemoglobin and functions primarily to transport... Read More

Cystic fibrosis

Definition noun An autosomal recessive disorder caused by mutations in the gene that encodes for cystic fibrosis... Read More

Prodromal period

There are five stages (or phases) of a disease. (Hattis, 2020). These stages are (1) Incubation period, (2) Prodromal... Read More

Immune system

Definition noun The organ system that is involved in protecting the organism from infection, infestation, and other... Read More

Hemoglobin

Definition noun, plural: hemoglobins A biomolecule made up of haeme (i.e. oxygen-carrying, nonprotein, ferrous component)... Read More

Mitochondrion

Mitochondrion Definition What are mitochondria? The term “mitochondrion” comes from the two words of the Greek... Read More

Serratia marcescens

Definition Noun A gram-negative motile and non-endospore forming rod bacterium associated with hospital acquired infections... Read More

Urinary system

Definition noun The organ system concerned with the production and excretion of urine Supplement An organ system, (sometimes... Read More

Reproductive system

Definition noun An organ system that functions primarily for the purpose of reproduction, and is comprised of sex... Read More

Biological system

Definition noun, plural: biological systems A group of entities or organs that work together to carry out a particular... Read More

Nasopharynx

Definition noun, plural: nasopharynges or nasopharynxes (anatomy) The part of the pharynx extending from the posterior... Read More

Skeletal system

Definition noun An organ system whose primary function is for structural support and protection, and consists basically of... Read More

Aerial Respiration

Humans amongst a wide range of other species undergo this type of respiration. Aerial Respiration involves attaining water... Read More

Haemophilus parahaemolyticus

Definition Noun A gram-negative commensal bacterium involved as a causative agent in some human diseases including... Read More

Pulmonary ventilation

Definition noun (1) The process at which the air enters or leaves, between the lungs and the ambient air (2) The rate of... Read More

Neisseria flavescens

Definition Noun A gram-negative saprophytic bacterium found normally in the nasopharynx, mouth and upper respiratory tracts... Read More

Concentration gradient

Concentration gradient definition Concentration gradient refers to the gradual change in the concentration of solutes in a... Read More