General Terms

• Tissues is a group of cells organized for common purpose
• Organs are group of tissues organized for common purpose
• Organ systems are group of organs organized for common purpose
• Organisms is all organ systems organized for a common purpose
• Histology is the study of tissues
• Epithelium forms glandular tissue and lines the lumen of tubular organs and body cavities, and externally covers the body and organs
• Epithelium consists of cells anchored to a basement membrane with apical and basal surfaces
• The 4 types of connective tissues are: connective tissue proper, cartilage, bone and blood
• Connective Tissue Proper has small number of cells called as fibroblasts
• Cartilage has small number of cells called chondrocytes(adult cell) or chondroblasts (young)
• Bone has small number of cells called osteocytes (mature) or osteoblasts (young)
• Blood has small number of cells called red blood cells
• Epithelium consists of cells called epithelial cells.
• Connective Tissue has small number of cells and are surrounded by extracellular matrix (ECM), meaning the cells have extra space between them unlike those of in epithelium tissues
• Collagen is the most abundant body protein in the body and is found in the skin, bones, and blood vessels
• The function of connective tissue proper is to connect, attach and package cells and other tissues
• The 3 types of cartilage are: Hyaline, Elastic, Fibrocartilage
• chondroblasts are young cells in the cartilage that maintains it
• osteoblasts are young cells in the bone tissue that secrete bone matrix and build new bone
• Muscle tissues are comprise of contractile type of cell and are responsible for movement and contraction
• The 3 types of muscle tissues are skeletal, cardiac, and smooth
• Nervous Tissue is comprised of cells called neurons that carry electrical impulses around the body
• Dendrites conducts impulses from the cell body to the axon terminals
• soma is the cell body of neurons
• axon are surrounded by schwann cells to insulate that conducts the impulse
• the places where neurons connect and communicate with each other is called as synapse
• Neurons send and receive messages via neurotransmitters separated by synapse
• Neuroglia are the non-neuronal cells that surround and support neurons.