CHAP23_2402 - 1 Chapter 23 BIOLOGY 2402 Anatomy and...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
C h a p t e r 2 3 1 BIOLOGY 2402 Anatomy and Physiology Lecture CHAPTER 23 THE RESPIRATORY SYSTEM
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C h a p t e r 2 3 2 THE RESPIRATORY SYSTEM (Cells need a continuous supply of Oxygen (O2) for various metabolic reaction that release energy from nutrient molecules; and release quantities of Carbon dioxide (CO2).) (Since an excessive amount of carbon dioxide produces acid conditions that are poisonous to cells, the excess gas must be eliminated quickly and efficiently .) Cardiovascular and Respiratory System are two systems that supply Oxygen and eliminate Carbon dioxide. (1) Respiratory System provides for gas exchange, intake of Oxygen and elimination of Carbon dioxide. (2) Cardiovascular System transports the gases in the blood between the lungs and body cells. Both participate equally in respiration. Failure of either system has the same effect on the body: disruption of homeostasis and rapid death of cells from oxygen starvation and build-up of waste products. Respiration Is the overall exchange of gases between the atmosphere, blood, and cells. Includes: 1. Ventilation, the movement of air into and out of the lungs; 2. Gas exchange between the air in the lungs and the blood, sometimes called external respiration; 3. Transport of oxygen and carbon dioxide in the blood; and 4. Gas exchange between the blood and the tissues, sometimes called internal respiration.
Background image of page 2
C h a p t e r 2 3 3 Three Basic Steps in Respiration : 1. Pulmonary Ventilation (Breathing) - is the inspiration (inflow) and expiration (outflow) of air between the atmosphere and the lungs. 2. External Respiration - is the exchange of gases between the air spaces of the lungs and blood in pulmonary capillaries. Blood gains O 2 and loses CO 2 . 3. Internal Respiration - is the exchange of gases between blood in system capillaries and tissue cells. Blood loses O 2 and gains CO 2 . PATHWAY OF AIR FROM THE NOSE TO THE CAPILLARIES OF THE LUNGS NOSE NASAL CAVITIES AND PARANASAL SINUSES Tonsils PHARYNX (throat) Upper Respiratory TRACHEA BRONCHI BRONCHIOLES ALVEOLI LUNG CAPILLARIES BLOOD STREAM
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
C h a p t e r 2 3 4 FUNCTIONS OF THE RESPIRATORY SYSTEM 1. Gas Exchange 2. Regulation of Blood pH 3. Voice production 4. Olfaction 5. Protection ANATOMY AND HISTOLOGY OF THE RESPIRATORY SYSTEM Respiratory System consists of the nose, pharynx (throat), Larynx (voice box), trachea (windpipe) bronchi, and lungs. (a). Upper Respiratory System - refers to the nose, pharynx (throat), and associated structure (b). Lower Respiratory System - refers to the larynx (voice box), trachea (windpipe), bronchi, and lungs. Nose Has an external and an internal portion inside the skull. External portion is made of cartilage (framework of bone and hyaline cartilage covered with muscle and skin) and skin and is lined with mucous membrane. External Nares (Nostrils)
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 37

CHAP23_2402 - 1 Chapter 23 BIOLOGY 2402 Anatomy and...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online