ATI TEAS ALL SECTIONS PREP 2022 ANATOMY & PHYSIOLOGY

ATI TEAS ALL SECTIONS PREP 2022 ANATOMY & PHYSIOLOGY Anatomy: is what you see with your eyes in the human body. Microscopic Anatomy: examines cells and molecules.  Cytology: study of cells.  Histology: study of tissues. Physiology: is the study of functions of anatomical structures. *Smallest living is a CELL. *Smallest organisms is a ATOM. Levels of Hierarchy Atom- the most basic complete unit of an element. Molecule- a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction. Organelles- are cells parts that function within a cell. Cells- the basic structural unit of an organism from which living things created. Is one individual cell. Tissues- a group of cells with similar structure that functions together as a unit, but at a lower level than organs. Organ- a self contained part of an organism that performs specific functions. Is formed by two or more similar tissues. Organ System- functional groups of organs that work together within the body: circulatory, integumentary, skeletal, reproductive, digestive, urinary, respiratory, endocrine, lymphatic, muscular and nervous.  Humans have 11 Organ Systems. Cells Structure • Nucleus - holds the cells DNA in form of chromatin • Ribosomes- small structures that build proteins “amino acids”. • Golgi Apparatus- modifies and packages proteins secreted from cell. • Vacuoles - storage, digestion and waste removal. • Cytoskeletal- series of rod shaped proteins that provide shape/support cell. • Microtubules - part of the cytoskeletal. • Cytosol - liquid material in cell. • Cell membrane - separate internal and external cellular environment allows material to enter and exit cell. • Endoplasmic Reticulum- smooth or rough transport system of the cell. • Mitochondria- generates ATP powerhouse of the cell. ATP production is called cellular respiration Animal Cells Centrosome- pairs of centrioles involved in mitosis. Centriole- cylinders involved in cellular division. Lysosomes- the purpose of the lysosome is to digest things. They might be used to digest food or break down the cell when it dies. Cilia- cause cell to move. Flagella- whip tail to move cell. TISSUES:  Group of CELLS.  Muscle, Nerve, Epithelial, Connective. 1. Epithelial: (joined together tightly) Example. Skin 2. Connective: (dense, loose, or fatty) Example. Tissue, Cartilage, Tendons, Ligaments, Fat, Blood, Lymph.