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character and regenerative cells Endocrine and goblet cells have been described in some insect groups Regenerative cells form groups called regenerative nests or crypts They may also be loca. Prepared by : Reem Aldossari. Lab 2. ZOO 103. Structure . closely packed cells . Specialized. to cover external surfaces or line internal cavities.. Epithelial cells are packed tightly together, with almost . Study of cells, tissues and organs as seen with the help of microscope. Study . Histology. Often called . Microscopic Anatomy. Greek word – . . Histos. = tissue. . Logia. =science/study. Cells work together in functionally related groups called tissues. Anatomy and . Physiology. Objectives. Define tissue. Describe the germ tissue layers, their location, and what tissues they produce in eucoelomate animals (humans).. List the 4 major types of tissues of the human body.. Lab 2. ZOO 103. Structure . They are c. losely packed cells.. . Specialized. to cover external surfaces. . or line internal cavities.. Epithelial cells are packed tightly . together, with almost . Cells. In the late 1600’s British born Robert Hooke coined. the term "cell" to describe the basic unit of life.. Where did the term cell come from?. In 1665 Robert Hooke inspected thin slices of cork and found that they consisted of millions of small, “irregular units”. I. Introduction. . A. Introduction. A. Introduction. Cells . are organized into . layers or groups of similar cells with a common function called tissues. .. 2. Intercellular junctions connect . Lec. 2. 2. nd. Grade – Fall Semester 2021-2022. . Goran Noori Saleh . MSc. At HMU(goran.nori. @tiu.edu.iq). 24/10/2021. CLASSIFICATION OF EPITHELIA. Simple epithelium: . Single layer of cells resting on a basement membrane. . Study . Histology. Often called . Microscopic Anatomy. Greek word – . . Histos. = tissue. . Logia. =science/study. Cells work together in functionally related groups called tissues. 4 basic type of tissues:. ZOO 103. Structure . They are c. losely packed cells.. . Specialized. to cover external surfaces. . or line internal cavities.. Epithelial cells are packed tightly . together, with almost . no intercellular . thelium. = “cloak”. Epithelial cells—all communicate with the outside world. ---. Squamous ( plate like and protective function) . epithelium lining the . Skin, ear canal, anus, cervix, vagina, esophagus-. and their associated . extracellular substances(ECM). , which are specialized to carry out specific functions.. B. . Four Primary Tissues of the Body. 1. . Epithelium. 2. . Connective Tissue. 3. . Muscle. Lec2/ Epithelial tissue. م.م. . منار الزهيري. Epithelial tissue. Tissues are: Collections of specialized cells and cell products organized to perform a limited number of functions. Histology = study of tissues.. Neoplasia. is a process of “new growth” in which normal cells undergo irreversible genetic changes, which render them unresponsive to ordinary controls on growth exerted from within the “transformed” cell or by surrounding “normal” cells.. Tissues – Introduction. a group of similar cells specialized to carry on a particular function. tissue = cells + extracellular matrix. nonliving portion of a tissue that supports cells. 4 types. epithelial = protection, secretion, absorption.