Search Results for: trachea
Bifurcation of trachea
Bifurcation of trachea The division of the trachea into the right and left main bronchi; it occurs at the level of the fifth... Read More
Hyaline cartilage
Hyaline Cartilage Definition Before we define hyaline cartilage, let us understand what cartilage is. What is cartilage? Is... 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
Book lungs
Book Lungs Definition Lungs are known as the organs that help organisms breathe. When we think of lungs, we think of the... Read More
Bronchopulmonary lymph node
Definition noun, plural: bronchopulmonary lymph nodes Any of the many lymph nodes located in the hilum of each lung, and... Read More
Analogous structures
Analogous Structures Definition In evolutionary biology, analogous structures are biological structures having similar or... Read More
Pseudostratified epithelium
Definition noun, plural: pseudostratified epithelia An epithelial tissue comprised of a single layer of epithelial cells... Read More
Oropharynx
Definition noun, plural: oropharynges, oropharynxes (anatomy) The oral part of the pharynx, located behind the oral... Read More
Pseudostratified columnar epithelium
Definition noun, plural: pseudostratified columnar epithelia A special type of columnar epithelium composed of a single... Read More
Stratified columnar epithelium
A stratified columnar epithelium (plural: stratified columnar epithelia) is a type of stratified epithelium in which the... Read More
Xylem vessel
Definition noun, plural: xylem vessels (botany) One of the tracheary elements of xylem that is characterized by being made... Read More
Principles of Hormonal Control Systems
Hormones are chemical messengers that enter the blood directly upon their secretion from endocrine glands. A single gland or... Read More
Nasopharynx
Definition noun, plural: nasopharynges or nasopharynxes (anatomy) The part of the pharynx extending from the posterior... Read More
Ancylostoma duodenale
Definition noun A hookworm species of humans and regarded as the old world hookworm of man Supplement Ancylostoma duodenale... Read More
Alimentary canal
Definition of Alimentary canal What is the alimentary canal? The alimentary canal is a muscular hollow continuous tubular... Read More
Elastic cartilage
The cartilage is a connective tissue characterized by having an extracellular matrix that is abundant in chondroitin sulfate... Read More
Respiratory system
Definition noun An organ system comprised of organs and structures associated for respiration or gas exchange Supplement An... Read More
Thoracic cavity
Definition noun The body cavity of the human body (and other animal bodies) protected by the thoracic walls, and located... Read More
Brown adipose tissue
Definition noun, plural: brown adipose tissues A type of adipose tissue found in mammals that is brownish as opposed to... Read More
Residual volume
Residual volume is a term that is most often seen in lung physiology where it is defined as the amount of air remaining in... Read More
Sternal angle
sternal angle The angle between the manubrium and the body of the sternum at the manubriosternal junction. Marks the level... Read More
Vascular plants
Definition of Vascular plants The term 'vascular' is derived from the Latin word vāsculum, vās, meaning "a container and... Read More
Epithelium
An epithelium is a type of animal tissue made up of densely packed cells (called epithelial cells) that rest on a basement... Read More
Digestion and Absorption of Food
The gastrointestinal (GI) system includes the gastrointestinal tract (mouth, pharynx, esophagus, stomach, small intestine,... Read More