281 results found

Search Results for: a layer

Epidermis

Epidermis Definition What is the epidermis? We can define the epidermis as one or more layers of cells forming the tough... Read More

Simple squamous epithelium

Simple Squamous Epithelium Definition Simple squamous epithelium, also known as simple squamous epithelial tissue or... Read More

Malpighian layer

Definition noun The lower layer of epidermis consisting of non-keratinized, viable cells, in contrast to the outer (upper)... Read More

Basal layer

Definition noun (1) The innermost layer of the epidermis made up of basal or germinative cells capable of proliferating by... Read More

A layer

A layer (Science: molecular biology) right handed double helical dna with approximately 11 residues per turn. Planes of base... 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

Stratified squamous epithelium

Definition noun, plural: stratified squamous epithelia A type of stratified epithelium in which the topmost layer is made up... 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

Mesophyll layer

Definition noun, plural: mesophyll layers (botany) The tissue in the interior of a leaf made up of photosynthetic... Read More

Diarthrodial joint

What is a diarthrodial joint? A diarthrosis joint is a freely moving joint characterized by its mobility and joint cavity... Read More

Alimentary canal

Definition of Alimentary canal What is the alimentary canal? The alimentary canal is a muscular hollow continuous tubular... Read More

Community Patterns

By: Maria Victoria Gonzaga In the previous lesson, we learned what a population is, its attributes, and processes... Read More

Synovial membrane

Definition noun, plural: synovial joints The connective tissue lining the inner surface of the joint capsule of a synovial... Read More

Tapetum

Definition noun, plural: tapeta (botany) A layer of nutritive cells within the sporangium, providing nutrition for growing... 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

Triploblastic

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

Turgidity

Turgidity is the state of being turgid or swollen, especially due to high fluid content. In general context, turgidity... Read More

Digestion and Absorption of Food

The gastrointestinal (GI) system includes the gastrointestinal tract (mouth, pharynx, esophagus, stomach, small intestine,... Read More

Leaves

Leaves are highly efficient solar energy converters. They capture light energy and through the process of photosynthesis.... Read More

Synovial joint

Definition noun A movable joint comprised of a layer of fibrocartilage or hyaline cartilage that lines the opposing bony... Read More

Movement of Molecules Across Cell Membranes

Diffusion Diffusion is essentially the movement of molecules from a region of higher concentration to a region of lower... Read More

Lymphatic vessel

Definition noun, plural: lymphatic vessels (anatomy) A vessel that carries lymph and is responsible for the removal of... Read More

Stratified columnar epithelium

A stratified columnar epithelium (plural: stratified columnar epithelia) is a type of stratified epithelium in which the... Read More

Parenchyma

Parenchyma Definition What does parenchyma mean? Let's define the word "parenchyma". Most of the functional tissues in... 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

S layer

Definition noun A single layer of about 5 to 25 nm in thickness, comprised of identical proteins (glycoproteins) surrounding... Read More

Joint capsule

Definition noun, plural: joint capsules A sac-like fibrous tissue that envelopes a synovial joint Supplement Synovial joints... 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

Eubacteria

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

Pith

Pith Definition In general, the term "pith" refers to the "soft inner portion" of something. In botany, a pith refers... Read More

Stratified epithelium

Definition noun, plural: stratified epithelia An epithelial tissue comprised of more than one layer of epithelial cells,... Read More

Peritoneum

Definition noun, plural: peritonea (anatomy) The serous membrane forming the lining of the abdominal cavity or... Read More

Endomembrane system

Ever wondered how biomolecules are made within the cell and then they are released outside the cell for use by the body?... Read More

Primary cell wall

Definition noun plural: primary cell walls ˈpɹaɪməɹi sɛl wɔːl The layer of the plant cell wall that forms prior to... Read More

Phelloderm

Definition noun, plural: phelloderms (botany) A part of the periderm made up of cells produced inwardly by the cork... 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

Stratum germinativum

Definition noun The innermost layer of the epidermis comprised of keratinocyes capable of proliferating by mitosis,... Read More

Stratum corneum

Definition noun The outermost layer of the epidermis comprised of corneocytes and accounts for most of the protective... Read More

Periderm

Definition noun, plural: periderms (botany) An outer covering that replaces the epidermis of certain plants (embryology)... Read More

Stratified cuboidal epithelium

Definition noun, plural: stratified cuboidal epithelia A type of stratified epithelium in which the topmost layer is made up... Read More