Lymphatic system Flashcards
Lymphatic system Key Structures
Lymph nodes
Tonsils
Spleen (largest)
Thymus
Lymphatic system
Functions
Balancing interstitial fluids
Absorbing fats and fat-soluble vitamins
Defending against illness and disease
Lymph
the colorless fluid of the lymphatic system
Interstitial fluid
the fluid found between cells
Respiratory system
the lungs and air passageways that supply oxygen to the body and remove carbon dioxide
Respiratory system
Key structures
Nose and nasal cavities: The nose is made of bone and cartilage. Air and particles enter the body through the nose.
Pharynx: The pharynx is commonly called the throat and is a passageway for both air and food.
Larynx: This passageway is between the pharynx and trachea.
Trachea: This is the primary passageway for air moving into the lungs.
Bronchi: This is the passageway of air into the functional tissues of the lungs.
Lungs: The right lung has three lobes, while the left lung has two lobes. The lungs are separated by a membrane partition called the mediastinum, which is where the heart sits.
Alveoli: the small sacs within the lungs where gas exchange occurs (by diffusion)
Respiratory system
Functions
Providing oxygen for metabolic processes
Removing waste products of metabolism
Regulating the pH of blood
Respiration
the intake of oxygen and subsequent release of carbon dioxide in an organism
Pulmonary ventilation
the process of exchanging air between the lungs and the ambient air
Inspiration
breathing air into the lungs
Expiration
breathing air out of the lungs
Diaphragm
the dome-shaped muscle that separates the lungs and pleural cavity from the abdomen; the primary muscle in pulmonary respiration
Diffusion
the passive movement of molecules or particles along a concentration gradient or from regions of higher concentration to regions of lower concentration
Thoracic cavity
the chest cavity enclosed by the ribs, sternum, and spinal column
Intra-alveolar pressure
the pressure within the alveoli that changes throughout respiration
