Heidi Cook July 15, 2020 Anatomy
One of the most prominent characteristic features is the ability to use our hands, especially for tasks that require dexterity, such as writing, opening a bottle of water, opening a doorknob, etc.
Form is closely related to function in all living things. For example, the thin flap of your eyelid can snap down to clear away dust particles and almost instantaneously slide back up to allow you to see again. At the microscopic level, the arrangement and function of the nerves and muscles that serve the eyelid allow for its quick action and retreat. At a smaller level of analysis, the function of these nerves and muscles likewise relies on the interactions of specific molecules and ions. Even the three-dimensional structure of certain molecules is essential to their function.
In the 2nd century ce, Greek physician Galen assembled and arranged all the discoveries of the Greek anatomists, including with them his own concepts of physiology and his discoveries in experimental medicine. The many books Galen wrote became the unquestioned authority for anatomy and medicine in Europe because they were the only ancient Greek anatomical texts that survived the Dark Ages in the form of Arabic (and then Latin) translations.
Thin sections and staining had become standard tools for microscopic anatomists by the late 19th century. The field of cytology, which is the study of cells, and that of histology, which is the study of tissue organization from the cellular level up, both arose in the 19th century with the data and techniques of microscopic anatomy as their basis.
Superficial arteries and veins of the face and scalp.
The new application of magnifying glasses and compound microscopes to biological studies in the second half of the 17th century was the most important factor in the subsequent development of anatomical research. Primitive early microscopes enabled Marcello Malpighi to discover the system of tiny capillaries connecting the arterial and venous networks, Robert Hooke to first observe the small compartments in plants that he called “cells,” and Antonie van Leeuwenhoek to observe muscle fibres and spermatozoa. Thenceforth attention gradually shifted from the identification and understanding of bodily structures visible to the naked eye to those of microscopic size.
Tag Cloudanatomy and physiology exam questions and answers anatomy and physiology quiz questions and answers anatomy and physiology exam questions hesi a2 anatomy and physiology test a&p practice test basic anatomy and physiology questions anatomy and physiology practice test anatomy and physiology exam 1 practice test anatomy and physiology test questions and answers hesi a2 a&p practice test hesi anatomy and physiology practice test anatomy and physiology test questions human anatomy and physiology questions and answers hesi a2 anatomy and physiology practice questions hesi a2 practice test anatomy and physiology anatomy and physiology practice exam human anatomy and physiology questions hesi a2 anatomy and physiology practice anatomy and physiology practice questions a&p practice questions