What is secretory tissue and its types?
The tissues that are concerned with the secretion of gums, resins, volatile oils, nectar latex, and other substances in plants are called secretory tissues. These tissues are classified as either laticiferous tissues or glandular tissues.
What is the function of secretory tissues?
On the basis of the variability and location of the secretory tissues in the plant body, the following are suggested: (1) In relation to their surrounding environment, the secretory tissues fulfill two very important ecological functions—protection against herbivores and pathogens and attraction of pollinators.
How many types of secretory tissue are there?
They are of two types: Laticiferous tissues and Glandular tissues.
What is secretory tissue in human body?
Secretory cells and tissues are concerned with the accumulation of metabolism by products which are not used as reserve substances. Most secretory cells are spe- cialized cells derived from elements belonging to other tissues, mainly epidermis or parenchymatous tissues.
What is secretory cells?
Secretory cells are tall columnar cells containing secretory granules in their cytoplasm. The marks of proteosynthetic activity are represented by numerous, well-developed profiles of the Golgi apparatus and granular endoplasmic reticulum.
Where are secretory tissues located?
Glands: Glands are well-organized secretory structures, composed of diverse types of cells. The secretory materials are produced and liberated by the protoplasts of the cells. The substances may be at once exuded from the seats of formation as in nectaries, or they may remain stored in some cavity inside.
Where are secretory cells found?
They are the predominant secretory cells in the trachea, extrapulmonary bronchi, and proximal intrapulmonary bronchioles of laboratory rats. Serous cells are also present in some subepithelial lateral and septal glands in the nasal airways of rats and mice, and submucosal glands in human airways.
What are the types of secretory cells?
Summary: The intestinal epithelium consists of four main specialized cell lineages: absorptive enterocytes and three secretory cell types known as enteroendocrine, Paneth, and goblet cells.
Where is secretory cells present?
What is the meaning of secretory?
Medical Definition of secretory : of, relating to, or promoting secretion also : produced by secretion.
What are examples of secretory cells?
Endocrine and exocrine pancreatic cells, thyroid and parathyroid endocrine cells, adenohypophysis, adrenal and pineal endocrine cells, the many types of gastric exocrine and endocrine cells, the mucus secretory cells of the lungs and of the bowels, the salivary gland cells, the lacrimal gland cells, the sebaceous gland …
What are secretory products?
After synthesis, secretory products leave the protoplast and accumulate in the periplasmic space, from which they then pass through the cell wall and out of the plant cell. This process is common to a wide variety of secretory structures such as nectaries, colleters and resin glands.
What is secretory cell?
What is cell secretion?
Secretion is a fundamental cellular process involving the regulated release of intracellular products from cells. Physiological functions such as neurotransmission, or the release of hormones and digestive enzymes, are all governed by cell secretion.
What are the types of cell secretion?
- Beta Cell.
- Secretion (Process)
- Mast Cell.
- Goblet Cell.
- Calcium Ion.