Essential anatomy 3 vs essential anatomy 5

#ESSENTIAL ANATOMY 3 VS ESSENTIAL ANATOMY 5 SKIN#
#ESSENTIAL ANATOMY 3 VS ESSENTIAL ANATOMY 5 LICENSE#

The discipline of anatomy is divided into macroscopic and microscopic. Human anatomy is one of the essential basic sciences that are applied in medicine. Anatomy and physiology, which study the structure and function of organisms and their parts respectively, make a natural pair of related disciplines, and are often studied together. Anatomy is inherently tied to developmental biology, embryology, comparative anatomy, evolutionary biology, and phylogeny, as these are the processes by which anatomy is generated, both over immediate and long-term timescales. It is an old science, having its beginnings in prehistoric times. Anatomy is a branch of natural science which deals with the structural organization of living things.

#ESSENTIAL ANATOMY 3 VS ESSENTIAL ANATOMY 5 LICENSE#

Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License license.Anatomy (Greek anatomР”вЂњ, ' dissection') is the branch of biology concerned with the study of the structure of organisms and their parts. Wise, Eddie Johnson, Brandon Poe, Dean H. Use the information below to generate a citation.

Then you must include on every digital page view the following attribution: If you are redistributing all or part of this book in a digital format, Then you must include on every physical page the following attribution: If you are redistributing all or part of this book in a print format, Want to cite, share, or modify this book? This book is In this chapter, you will learn about the major components and functions of a prototypical, generalized cell and discover some of the different types of cells in the human body. These tiny fluid-filled sacs house components responsible for the thousands of biochemical reactions necessary for an organism to grow and survive. In the century that followed, the theory that cells represented the basic unit of life would develop. About ten years later, Antonie van Leeuwenhoek became the first person to observe living and moving cells under a microscope. Without realizing their function or importance, Hook coined the term РІР‚СљcellРІР‚Сњ based on the resemblance of the small subdivisions in the cork to the rooms that monks inhabited, called cells. The concept of a cell started with microscopic observations of dead cork tissue by scientist Robert Hooke in 1665. When a particular parameter, such as blood pressure or blood oxygen content, moves far enough out of homeostasis (generally becoming too high or too low), illness or disease-and sometimes death-inevitably results. For example, living cells require a water-based environment to survive in, and there are various physical (anatomical) and physiological mechanisms that keep all of the trillions of living cells in the human body moist. Homeostasis is a term used in biology that refers to a dynamic state of balance within parameters that are compatible with life. Keep this theme in mind as you tour the inside of a cell and are introduced to the various types of cells in the body.Р”Р„ primary responsibility of each cell is to contribute to homeostasis. These differences illustrate one very important theme that is consistent at all organizational levels of biology: the form of a structure is optimally suited to perform particular functions assigned to that structure. With their long winding appendages, nerve cells can communicate with one another and with other types of body cells and send rapid signals that inform the organism about its environment and allow it to interact with that environment.

A nerve cell, on the other hand, may be shaped something like a star, sending out long processes up to a meter in length and may live for the entire lifetime of the organism.

#ESSENTIAL ANATOMY 3 VS ESSENTIAL ANATOMY 5 SKIN#

Packed tightly into rows and sheets, the squamous skin cells provide a protective barrier for the cells and tissues that lie beneath. A structural skin cell may be shaped like a flat plate (squamous) and live only for a short time before it is shed and replaced. Cellular and developmental biologists study how the continued division of a single cell leads to such complexity and differentiation.Р”В¬onsider the difference between a structural cell in the skin and a nerve cell. These different cell types form specialized tissues that work in concert to perform all of the functions necessary for the living organism. During this developmental process, early, undifferentiated cells differentiate and become specialized in their structure and function. You developed from a single fertilized egg cell into the complex organism containing trillions of cells that you see when you look in a mirror.

Essential anatomy 3 vs essential anatomy 5