.::Vocabulary of Concepts of Ch.33 Animal tissue::.

1.       adhering junction:           Junction where a mass of anchored proteins help adjoining cells adhere.

2.       adipose tissue:  A connective tissue having an abundance of fat-storing cells.

3.       blood:    Fluid connective tissue of water, solutes, and formed elements (blood cells, platelets). Transports substances to and from cells, helps maintain internal environment.

4.       bone tissue:       Of vertebrate skeleton, a tissue of osteoblast secretions hardened with minerals.

5.       cardiac muscle tissue:    A contractile tissue that is present only in the heart wall.

6.       cartilage:              Connective tissue with solid, pliable intercellular material that resists compression.

7.       dense, irregular connective tissue:          Animal tissue with fibroblasts, many asymmetrically positioned fibers in ground substance. In skin and some capsules around organs.

8.       dense, regular connective tissue:            Animal tissue with rows of fibroblasts between parallel bundles of fibers. In tendons, elastic ligaments.

9.       ectoderm:           The first-formed, outermost primary tissue layer of animal embryos; gives rise to nervous system tissues and integument's outer layer.

10.   endocrine gland:              Ductless gland that secretes hormones, which the bloodstream distributes.

11.   endoderm:         Inner primary tissue layer of animal embryos; source of inner gut lining and derived organs.

12.   epithelium:         Animal tissue that covers external surfaces and lines internal cavities and tubes. One surface is free and the other rests on a basement membrane.

13.   exocrine gland: Glandular structure that secretes products, usually through ducts or tubes, to a free epithelial surface.

14.   gap junction:      Cylindrical arrays of proteins in the plasma membrane that pair up as open channels for signals between adjoining cells.

15.   gland cell:            A cell that secretes products unrelated to their own metabolism for use elsewhere

16.   homeostasis:     State in which physical and chemical aspects of internal environment (blood, interstitial fluid) are being maintained within ranges suitable for cell activities.

17.   internal environment:   Blood + interstitial fluid.

18.   loose connective tissue:               Animal tissue with fibers, fibroblasts loosely arrayed in semifluid ground substance.

19.   mesoderm:         Primary tissue layer of all large, complex animals; gives rise to many internal organs and part of the integument.

20.   nervous tissue: Connective tissue composed of neurons and often neuroglia.

21.   neuroglia:            Collectively, cells that structurally and metabolically support neurons. They make up about half the volume of nervous tissue in vertebrates.

22.   neuron:                Type of nerve cell; basic communication unit in most nervous systems.

23.   organ:    Body structure with definite form and function that consists of more than one tissue.

24.   organ system:    Organs interacting chemically, physically, or both in a common task.

25.   skeletal muscle tissue:   Striated contractile tissue that is the functional partner of bone.

26.   smooth muscle tissue:   Nonstriated contractile tissue found in soft internal organs.

27.   tight junction:    Cell junction where strands of fibrous proteins oriented in parallel with a tissue's free surface collectively block leaks between the adjoining cells.

28.   tissue:   Of multicelled organisms, a group of cells and intercellular substances that function together in one or more specialized tasks.