76 results found

Search Results for: epidermis

Epidermis

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

Integumentary system

Integumentary System Definition The integumentary system is the outermost layer of the body. The animal body, in... Read More

Leaves

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

Plant Tissues

Plants are composed of three major organ groups: roots, stems, and leaves. As we know from other areas of biology, these... 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

Keratinocyte

Definition noun, plural: keratinocytes The predominant type of cell in the epidermal layer of the skin Supplement The skin... 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

Stratum granulosum

Definition noun The thin layer of the epidermis comprised of granular keratinocytes that migrated from the stratum... Read More

Stratum germinativum

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

Keratin

Keratin is a fibrous protein naturally present in hair, skin, and nails. In hair care, it serves as a protective and... Read More

Roots

Upon seed germination, the embryo root, called the radicle, grows and develops into the first root. The radicle may thicken... Read More

Stems

External Form of a Woody Twig A woody twig, or stem, is an axis with leaves attached. The leaves are arranged in various... Read More

Stratum lucidum

Definition noun The thin, clear layer of the epidermis comprised of keratinocytes filled with eleidin proteins, and occurs... Read More

Stratum spinosum

Definition noun The thin layer of the epidermis between stratum basale and stratum granulosum, and comprised of... 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

Cornification

Definition noun, plural: cornifications The process of forming a keratinized, horny layer of epidermis cornified,... Read More

Skin

Definition noun, plural: skins (anatomy) The external membranous integument of the body; the outer protective covering of... Read More

Stratum corneum

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

Dermis

Definition noun Mesodermally-derived connective tissue underlying the epithelium of the skin Supplement In humans, the skin... Read More

Mesophyll layer

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

Permanent Tattoo Means Permanent Immune Action Of Macrophages

Have you ever wondered why a permanent tattoo seemed to last forever? A simple assumption would be is that the ink could... Read More

Protoderm

Definition noun, plural: protoderms (botany) The primary meristem from where the epidermis of the plant are... Read More

Papillary dermis

Definition noun The more superficial layer of the dermis that intertwines with the rete ridges of the epidermis, and is made... Read More

Cork cambium

Cork Cambium Definition Cork cambium is a secondary meristematic tissue that has a pivotal role in secondary growth in... Read More

Cork

Definition noun, plural: corks (botany) A part of the periderm that protects the inner plant tissues from mechanical... Read More

Cuticle

Definition noun The outermost, noncellular, protective covering of certain organisms Supplement The cuticle refers to the... Read More

Stoma

Definition noun, plural: stomata (botany) A tiny pore in a plant leaf surrounded by a pair of guard cells that regulate its... Read More

Dense irregular connective tissue

Dense Irregular Connective Tissue Definition Dense irregular connective tissue is one of the two major types of dense... Read More

Periderm

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

Apical meristem

Definition noun, plural: apical meristems (botany) A type of meristematic tissue that is located at the tips or terminal... Read More

Cortex

Definition noun, plural: cortexes, cortices (anatomy) The outer layer or region of a structure or an internal organ (botany)... Read More

Macrophytes

Introduction    Examples of Macrophytes. (Source: Canada's AquaticEnvironments) ... Read More

Leaf

Leaf Definition (botany) A plant organ that is specialized for photosynthesis. Collectively, it constitutes foliage.... Read More

Parenchyma

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

Squamous epithelium

Definition noun, plural: squamous epithelia An epithelial tissue comprised of squamous cells, as seen in epidermis,... Read More

Primary meristem

Definition noun, plural: primary meristems (''botany') A type of meristem that is involved in the primary growth and thus... 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

Follicle

Follicle 1. (Science: anatomy) Generally a small sac or vesicle. 2. (Science: botany) a kind of fruit formed from a single... Read More

Intercalary meristem

The basic structural framework of plants is composed of different types of tissues. Based upon the capacity to divide, the... Read More