CHAPTER 4 – TISSUES people.eku.edu/sumithrans/Zoo/labs/Tissues.p pt

An aggregation of cells and cell products of similar structure and embryonic origin that perform a common function

The study of tissues, especially their structure and arrangement

 Epithelial  Connective  Muscle  Nervous

An aggregation of tissues organized into a functional unit

Organs working together as functional units

 Sheet-like layer of cells  Cover surfaces or line cavities  Often has glandular cells for fluid secretion  Endothelium  Epithelium that lines heart, blood vessels and lymphatic vessels

 Simple Epithelium  Simple squamous – inside blood vessels  Simple cuboidal – lines ducts, ex. Kidney tubules, mucous glands  Simple columnar – lining of small intestine  Pseudostratified Columnar – trachea, bronchi

 Stratified Epithelium  Stratified squamous - skin  Transitional – urinary tract and bladder

 Tissue that connects  Loose connective tissue  adipose (fat)  Dense connective tissue  cartilage  Bone  Vascular tissue  Erythrocytes: Red Blood Cells – carry oxygen  Leucocytes: White Blood Cells – part of the immune system  Platelets - clotting

Erythrocytes: Red Blood Cells

Leucocytes: White Blood Cells

Platelets

 Smooth Muscle (=Involuntary Muscle)  Ex. Small intestine  Skeletal Muscel (=Voluntary Muscle)  Ex. Large muscles of body  Cardiac Muscle

SkeletalSmooth Cardiac

 Includes Nerves, Spinal Cord, Brain  Cells are called neurons