Anatomy Chapter 1 - Intro to anatomy

A) What is Anatomy? study of internal and external body structures relationships between structures e.g. bone and muscle Subdivisions: 1) Microanatomy microscope required a) cytology is _________________ histology is the study of tissues (groups of cells) 2) Gross Anatomy visible to the eye e.g. bone, heart, stomach, etc. body cavities (e.g. cranial, thoracic, abdominopelvic) B) Levels of Organization (simple to complex) 1) Chemical level (basic level) atoms e.g. Hydrogen (H) and Oxygen (O) atoms atoms join to form molecules e.g. H2O (water) 2) Cellular level molecules form organelles which form cells cell are the basic unit of structure and function of the body all cells contain chemicals, but the function of different types of cells may differ e.g. erythrocytes (red blood cells), neurons, muscle cells 3) Tissue level a group of structurally similar cells with a common function 4 major types: a) b) c) d) 4) Organ level 2 or more ____________ working together for a common function e.g. stomach BIOL1410 Lecture Notes – Fall 2024 UNIT 1: Introduction to Anatomy is made up of all four major tissues function is digestion 5) Organ system level several related organs that work together to accomplish a common purpose e.g. respiratory system lungs, trachea, etc. function is respiration 6) Organism All systems function together to maintain life Note: This is a Hierarchy - each level contains those below.