The skin is the largest organ of the human body and has several important functions. It is composed of three layers: the epidermis, dermis, and subcutaneous tissue. Functions of the skin: In summary, the skin is a complex organ that has several important functions, including protection, sensation, thermoregulation, vitamin D synthesis, immune defense, and excretion. …
Tissues are groups of cells that work together to perform a specific function in the body. There are four main types of tissues in the human body: epithelial, connective, muscle, and nervous tissue. In summary, the main types of tissues, their structure, location, and functions are as follows:
There are four main forms of intracellular signaling: contact-dependent, paracrine, synaptic, and endocrine. a) Contact-dependent signaling: This type of signaling occurs when a cell directly contacts another cell and delivers a signal. The signaling molecule is usually a membrane-bound protein or ligand, and the receptor is a protein on the surface of the target cell. …
You cannot copy content of this page
