The biomedical engineer works with the medical doctors, the nurses,the manufacturers and so on. In order to design new device for healthcare, basical understanding human body is prior. In order to find out the requirement of the special medical devices, therapy and so on, when we read the patents,journals, articles and so on and communicate with medical field people, it would be very helpful. In this chapter, fundamental anatomical terms and medical glossary would be introduced.
The body is composed of the head, trunk and limbs.
The trunk consists of the neck, thorax(chest) and abdomen (belly). The lowest part of the trunk is the perineum. The central axis of the trunk is the vertebral column, and the upper part of it(cervical part) supports the head.
The main parts of the upper limb are the arm, forearm and hand. Arm in anatomical form means the part between the shoulder and elbow. But, generally the arm means from the shoulder to before the hand.
The main parts of the lower limb are the thigh, leg and foot. Here also leg in anatomical term point out the part from knee to foot.But, generally the leg means from thigh to before the foot.
For the positions of structure in human anatomy, the whole body should stand upright with the feet together and the head and eyes looking to the front with the arms straight by the side and the palms of the hands facing forwards.
The ‘Median plane’ is an virtual vertical longitudinal line through the middle of the body from front to back, dividing the body into right and left halves.
The ‘Coronal planes’ are imaginary planes at right angles to the median plane.
The 'Transverse plane' divides the body into head and tail portions.
Phlebotomy (incision of vein); arthrotomy (joint); appendectomy (ectomy, meaning cut out excision of appendix); oophorectomy (excision of ovary); ileocecostomy (ostomy, meaning creation of an artificial opening, and os, pertaining to opening or mouth thus, an anastomosis of ileum and cecum)
Hypertrophy (enlargement or overnourishment); atrophy (undernourishment)
Volvulus (twisting of an organ, intestinal obstruction with twisting of bowel, or twisting of the esophagus)
A common treatment for life-threatening cardiac dysrhythmias, ventricular fibrillation and pulseless ventricular tachycardia. Defibrillation is composed of delivering a therapeutic dose of electrical energy to the heart with a device called a defibrillator.
The period of time when the heart refills with blood after systole (contraction).
Referring to the time when the heart is in a period of relaxation and expansion (dilatation).
Relating or being to the second part of the arterial pulse occurring during diastole of the heart or of an arterial pressure recording made during the same period.
also referred to as the posterior vena cava. A vein that carries blood from the lower body to the heart.
Latin for "within the living".Often employed over in vitro because it is better suited for observing the overall effects of an experiment on a living subject.
also spelled as ischaemia or ischæmia.Supply to tissues, causing a shortage of oxygen and glucose needed for cellular metabolism (to keep tissue alive).
Comes from the Greek for "having equal measurement".
Having equal tension. Having the same concentration of solutes as the blood. Physiology Of or involving muscular contraction in which the muscle remains under relatively constant tension while its length changes.
Histology is the study of the microscopic anatomy of cells and tissues. All organs of the body are formed of tissues. A tissue is a collection of similar type cells associated with some intercellular matrix (ground substance) controlled by some laws of growth and development. These cells perform the same functions. Tissues are usually divided into four categories:muscle tissue, nervous tissue, connective tissue, and epithelial tissue.
Muscle tissue is composed of "excitable" cells which can contract. Muscle tissue include a lot of microfilaments composed of actin and myosin, which are contractile proteins. There are three major types of muscle tissue:
Skeletal Muscle:It is attached to bones by tendons and associated with the body's voluntary movements. Skeletal muscle is striated muscle. Unlike cardiac muscle, the cells are not branched.
Visceral (Smooth) Muscle:It is found in many parts of the body such as the arteries, the bladder, the digestive tract and so on. Visceral muscle is also called smooth muscle as it doesn't have cross striations. Visceral muscle contracts slower than skeletal muscle, but the contraction can be continued for a longer period.
Cardiac muscle:It is so named because it is found in the heart. Cells are joined to one another by intercalated discs which allow the synchronization of the heart beat. Cardiac muscle is branched, striated muscle.
Nervous tissue is specialized to sense stimuli and transmit signals to and from different parts of an organism. The nervous system is split into two parts. One is the central nervous system which includes the brain and spinal cord while the peripheral nervous system contains the cranial and spinal nervous and provides the communication between the CNS and the rest of the body. Two main cell types are neurons and neuroglia. The neurons are the basic structural units of the nervous system. The neuroglia assist the propagation of the nerve impulse and provide nutrients to the neuron. Neurons transmit electricity through their plasma membrane and lose their ability to split once they commit to their roles (after birth). They last a life time and store memory. However, if they are destroyed they cannot be replaced. However with that said, you cannot avoid other parts of the brain to take over functions. Neurons also needs lots of oxygen and glucose and will die within 5 minutes without oxygen. Nervous tissue is composed of various types of nerve cells, all of which having an axon, the long stem-like part of the cell that sends action potential signals to the next cell. Nervous tissue is discussed more in Chapter 3.
Connective tissue (CT) supports, connects, or separates various tissues and organs of the body. It is one of the four major type tissues—the others of which are epithelial, muscle, and nervous tissues. Connective tissue can be found everywhere in the body except the central nervous system.
It is one of the four major types tissues. It is related to secretion, selective absorption, protection, transcellular transport and detection of sensation. In Greek ἐπί (epi) means "on" or "upon", and θηλή (thēlē) means "nipple".
Summary showing different epithelial cells/tissues and their characteristics.