Differential gene expression can form different cell types {tissue, cell}.
Tissues {adipose tissue}| can hold fat globules. Newborn brown adipose tissue helps stabilize body temperature. White adipose tissue is in abdomen and hips.
Connective tissues {blood tissue} can make cells and plasma. Red blood cells can carry hemoglobin. White blood cells can phagocytize foreign matter.
Specialized epithelial cells {nerve tissue}| can conduct voltage waves along dendrites and axons.
Specialized epithelial cells {reproductive tissue}| can be for sexual reproduction and make non-motile large female egg cells, moving small male sperm cells, and support cells.
Tissues {connective tissue}| {matrix, tissue} {tissue matrix} can support other tissues and secrete intercellular materials. Connective tissues include bone, cartilage, tendon, and fibrous tissue.
Connective tissues can secrete firm, rubber-like matrix {cartilage}| used for shape and light support.
Connective tissue {fibrous tissue}| can be for covering organs and separating organs, by secreting interlocking collagen-fiber network.
Connective tissue {ligament}| can connect organs or bone to bone.
Organs have connective tissue structures {stroma}. For example, cornea middle layer has collagen lamellae.
Connective tissue {tendon}| can connect muscles to each other and to bone.
Fibrous connective tissues {serosa} can lines pericardial, pleural, and peritoneal cavities. They have covering mesothelium.
Hyaluronic-acid cartilage {hyaline cartilage} covers joint bones.
Membranes {septum, membrane} can separate organs or body cavities.
Flat fibrous connective tissue {tarsal plate} shapes eyelid edges.
Connective tissues {bone}| can secrete organic matrix with calcium salts, in layers, which then harden. Some bone cells reabsorb matrix.
Bone has bone cells {fibroblast, bone}|.
Blood vessels and nerves {Haversian canal} go through matrix.
Bone has layers {lamellae}.
Bone centers {marrow, tissue}| have fat {yellow marrow} or regions {red marrow} where red blood cells form.
Continuous body-surface cell layers {epithelial tissue}| include skin, intestinal lining, mucus membrane, and sense tissue.
Inner body-surface epithelia {intestinal lining}| can be for absorption.
Inner body-surface epithelia {mucus membrane}| can be for secretion.
Cylindrical cells {muscular tissue}| can contain contractile actinomycin myofibrils. Muscles can be involuntary or voluntary.
Cardiac and smooth muscles {involuntary muscle}| can contract strongly, slowly, and for long times.
Heart has involuntary muscle {cardiac muscle}.
Involuntary muscles {smooth muscle}| can be in digestive tract and uterus.
Muscles {voluntary muscle}| can contract fast with short contraction time. Only mammals have lateral corticospinal tract, for voluntary-muscle control.
Voluntary muscles {skeletal muscle}| can attach to bones.
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0225