Week 5 Study Material PDF

Lab 4 – Epithelial and Connective Tissues  Announcements Exams are scheduled for 8:00 pm on 9/10, 10/1, 10/24 in Elliott Hall of Music The exam for 11/14 will be in class The final exam time, date and l...

Lab 4 – Epithelial and Connective Tissues  Announcements Exams are scheduled for 8:00 pm on 9/10, 10/1, 10/24 in Elliott Hall of Music The exam for 11/14 will be in class The final exam time, date and location are TBA – do not make travel plans for the end of the semester until this is announced Your first Medical Terminology Assignment for extra credit is due this week – 9/9. Your first exam is this week on 9/10 – look for your seating assignment in the Useful Documents section of Brightspace Plan to arrive at least 15 minutes early to Elliott Hall of Music to find your seat before the exam starts Learning outcomes: Week 4 Lab By the end of this lab, you will be able to do the following: Identify and classify the different types of epithelial and connective tissues based on distinguishing structural characteristics. Describe locations in the body where each type of epithelial and connective tissue can be found. Describe the functions of each type of epithelial and connective tissue in the human body Correlate function with structure for each tissue type.  4 Basic Tissue Types Epithelial - lines internal and external surfaces of the body, protection, secretion and absorption Connective – most abundant tissue and has multiple purposes, including support, protect organs, and bind other tissues to each other Nervous – contains excitable cells to rapidly transmit information from one location to another Muscular - contains elongated excitable muscle cells specialized for contraction Epithelial Tissue – lines the body surfaces both external and internal Characteristics: 1. STRUCTURALLY POLARIZED CELLS Free apical surface Basal surface is anchored to underlying connective tissue by the basement membrane (collagen IV, laminin, proteoglycans) 2. TIGHTLY PACKED TOGETHER CELLS Frequently attached to each other by cell junctions (e.g. tight junctions, adherens junctions, gap junctions, desmosomes) 3. NON-VASCULAR (AVASCULAR) Lacks blood vessels  SHAPE ARRANGEMENT 1. Squamous - transport 1. Simple – single layer 2. Cuboidal – secretion and absorption 2. Stratified – multiple layers 3. Columnar – secretion and absorption 3. Pseudo-stratified – single layer that looks like multiple layers  Connective tissue 3 Elements of Connective Tissue Connective tissue is the most abundant Most types of type of tissue and is found throughout the body. connective tissue Except for dense regular connective tissue consist of cells and the different types of cartilage, embedded in a matrix connective tissue is vascular. Connective tissue has at least eight made up of fibers and functions ground substance 1. Binds structures together CELLS MATRIX 2. Supports and protects 3. Serves as framework 4. Fills up spaces 5. Stores fat 6. In bone marrow it generates blood cells 7. Contains cells of the immune system that protect against infections: important site of inflammation 8. Cells help repair tissue damage TYPES OF CONNECTIVE TISSUE Connective tissue proper Specialized connective tissue 1. Loose (areolar) 1. Cartilage 2. Dense Hyaline cartilage Regular Elastic cartilage o Collagenous Fibrocartilage o Elastic Irregular 2. Bone 3. Reticular 3. Blood 4. Adipose In lab this week: You will use the microscope to examine and identify the histological structures of the following tissues: Lung: simple squamous epithelial tissue Thyroid: simple cuboidal epithelial tissue Skin: stratified squamous and stratified cuboidal epithelial tissue, dense irregular connective tissue, adipose connective tissue Small Intestine: simple cuboidal epithelial tissue Trachea: ciliated pseudostratified columnar epithelial tissue Epididymis: simple columnar epithelial tissue with stereocilia Mesenteries: loose (areolar) connective tissue Mammalian tendon: dense regular collagenous connective tissue Lymph node: reticular connective tissue Ligamentum nuchae: elastic connective tissue *you should be familiar with all the tissue types even if you are not required to take a picture of each type for the report The slides after this are for display during the lab. Simple Squamous - lung Stratified Squamous – skin (epidermis) Simple Cuboidal - thyroid Stratified Cuboidal – skin (sweat glands) Simple Columnar – small intestine goblet cell lamina propria simple columnar cells basement membrane Pseudostratified cilia Goblet cell Columnar - trachea lamina propria Stereocilia (epididymis) Loose areolar connective Fibroblast tissue (messenteries) Elastin Fibers Collagen Fiber Dense Regular connective tissue – mammal tendon Collagen fiber fibroblast Dense Irregular connective tissue – skin (dermis) Collagen fiber fibroblast Reticular connective tissue – lymph node fibroblast Reticular Collagen fiber Adipose connective tissue Adipose tissue adipocyte nucleus of adipocyte