Final Exam Review Guide: Blood, Heart, Blood Vessels, Lymphatic, Immune, and Respiratory Systems

Final Exam Review: Anatomy & Physiology II

Overview

This review guide covers essential topics for the final exam in Anatomy & Physiology II, focusing on six major chapters: Blood, Heart, Blood Vessels, Lymphatic System, Immune System, and Respiratory System. Each section highlights key concepts, definitions, and processes necessary for exam success.

Chapter 17: Blood

Composition and Functions of Blood

• Blood Components: Plasma (liquid matrix), formed elements (erythrocytes, leukocytes, platelets).

• Hematocrit: Percentage of blood volume occupied by red blood cells (RBCs).

• Functions: Transport (gases, nutrients, wastes), regulation (pH, temperature), protection (immune response, clotting).

Hemopoiesis and Erythropoiesis

• Hemopoiesis: Formation of blood cells in red bone marrow.

• Erythropoiesis: Production of RBCs, stimulated by erythropoietin (EPO) from kidneys.

• Hormonal Control: EPO increases RBC production in response to hypoxia.

Hemoglobin and Gas Transport

• Hemoglobin: Protein in RBCs that binds and transports oxygen and carbon dioxide.

• Oxygen Transport: Each hemoglobin molecule can carry four O2 molecules.

Blood Disorders

• Anemia: Reduced oxygen-carrying capacity of blood.

• Leukemia: Cancer of white blood cells.

Hemostasis

• Hemostasis: Process to stop bleeding, involving vascular spasm, platelet plug formation, and coagulation.

• Coagulation: Series of steps leading to fibrin clot formation.

Blood Typing

• ABO and Rh Systems: Classification based on antigens on RBC membranes.

Chapter 18: The Heart

Heart Anatomy and Function

• Chambers: Right and left atria, right and left ventricles.

• Valves: Atrioventricular (tricuspid, bicuspid/mitral) and semilunar (pulmonary, aortic).

• Blood Flow Pathway: Systemic and pulmonary circuits.

Cardiac Muscle and Conduction System

• Cardiac Muscle: Striated, involuntary, intercalated discs for electrical coupling.

• Conduction System: SA node, AV node, bundle of His, bundle branches, Purkinje fibers.

Cardiac Cycle and Heart Sounds

• Cardiac Cycle: Sequence of events in one heartbeat (systole and diastole).

• Heart Sounds: "Lub-dub" due to valve closures.

Electrocardiogram (ECG/EKG)

• ECG: Records electrical activity of the heart; P wave (atrial depolarization), QRS complex (ventricular depolarization), T wave (ventricular repolarization).

Regulation of Heart Rate

• Autonomic Control: Sympathetic increases, parasympathetic decreases heart rate.

• Hormonal Control: Epinephrine, norepinephrine, thyroid hormone.

Cardiac Output

• Formula: $\text{Cardiac Output (CO)} = \text{Heart Rate (HR)} \times \text{Stroke Volume (SV)}$

Chapter 19: Blood Vessels

Types and Structure of Blood Vessels

• Arteries: Carry blood away from the heart; thick, elastic walls.

• Veins: Return blood to the heart; thinner walls, valves to prevent backflow.

• Capillaries: Site of exchange between blood and tissues; thin walls for diffusion.

Blood Pressure and Regulation

• Blood Pressure (BP): Force exerted by blood on vessel walls.

• Regulation: Neural (baroreceptors), hormonal (renin-angiotensin-aldosterone), and local mechanisms.

• Formula: $\text{BP} = \text{CO} \times \text{Total Peripheral Resistance (TPR)}$

Capillary Exchange

• Mechanisms: Diffusion, filtration, osmosis.

Chapter 20: Lymphatic System

Functions and Components

• Functions: Returns interstitial fluid to blood, absorbs dietary fats, immune defense.

• Components: Lymph, lymphatic vessels, lymph nodes, spleen, thymus, tonsils.

Lymph Flow and Drainage

• Lymphatic Capillaries: Collect excess fluid from tissues.

• Major Ducts: Thoracic duct, right lymphatic duct.

Lymphoid Organs and Immune Function

• Primary Organs: Red bone marrow, thymus (site of lymphocyte maturation).

• Secondary Organs: Lymph nodes, spleen, tonsils (immune surveillance and response).

Chapter 21: Immune System

Innate and Adaptive Immunity

• Innate Immunity: Non-specific, immediate defense (skin, mucous membranes, phagocytes, inflammation).

• Adaptive Immunity: Specific, slower response (B and T lymphocytes, antibodies).

Immune Response Sequence

• Antigen Presentation: Macrophages and dendritic cells present antigens to T cells.

• Clonal Selection: Activation and proliferation of specific lymphocytes.

• Antibody Production: B cells differentiate into plasma cells to secrete antibodies.

Self-Tolerance and Immune Disorders

• Self-Tolerance: Immune system does not attack body's own cells.

• Autoimmunity: Immune response against self-antigens.

Chapter 22: Respiratory System

Structure and Function

• Major Organs: Nose, pharynx, larynx, trachea, bronchi, lungs, alveoli.

• Functions: Gas exchange (O2 in, CO2 out), regulation of blood pH, voice production.

Mechanics of Breathing

• Inspiration: Diaphragm contracts, thoracic cavity expands, air flows in.

• Expiration: Diaphragm relaxes, thoracic cavity decreases, air flows out.

• Boyle's Law: Pressure and volume are inversely related ($P_1V_1 = P_2V_2$).

Gas Exchange and Transport

• External Respiration: Exchange of gases between alveoli and blood.

• Internal Respiration: Exchange of gases between blood and tissues.

• Oxygen Transport: Mostly bound to hemoglobin; some dissolved in plasma.

• Carbon Dioxide Transport: Dissolved in plasma, bound to hemoglobin, as bicarbonate ion ($CO_2 + H_2O \leftrightarrow H_2CO_3 \leftrightarrow H^+ + HCO_3^-$).

Sample Table: Blood Cell Types and Functions

Cell Type	Main Function
Erythrocytes (RBCs)	Transport oxygen and carbon dioxide
Leukocytes (WBCs)	Immune defense
Platelets (Thrombocytes)	Blood clotting

Study Tips

• Review each chapter's details and diagrams carefully.

• Practice with multiple-choice and short-answer questions.

• Understand processes, not just memorize facts.

• Use tables and flowcharts to organize information.

Additional info: Some content and explanations have been expanded for clarity and completeness based on standard Anatomy & Physiology II curriculum.