This week is not just a generic study break. It is a guided revision page mapped back to the actual Week 1-6 source topics. Use the sections below to revisit the main lecture ideas before you move on to new systems.
Work through the review in this order if you are unsure where to start:
Revision priorities this week are the topics that were easy to miss when the course moved quickly: blood test meaning, lymphatic return, arterial pH control, Gram-positive versus Gram-negative bacteria, foetal circulation changes at birth, kidney hormones, wound-healing stages, granuloma formation, and immunoglobulin classes.
Source focus: homeostasis overview, cell structure, cell division, cell communication, signal regulation.
Revise: negative versus positive feedback, receptors-control centres-effectors, prokaryotic versus eukaryotic cells, mitosis versus meiosis, and why cell signaling matters in physiology.
Check yourself: can you explain how glucose, temperature, or circadian rhythm are regulated using a feedback-loop model?
Source focus: microbes and infections, bacteria, viruses, fungi, parasites, infections and disease processes, infection control strategies.
Revise: chain of infection, Gram-positive versus Gram-negative differences, bacterial shape, viral reproduction, fungal and parasitic examples, endospores, and how sterilisation, disinfection, antisepsis, and antimicrobials differ.
Check yourself: can you identify a portal of entry and explain how to break one specific link in the infection chain?
Source focus: the blood, blood vessels, blood tests, lymphatics, acid-base balance.
Revise: RBCs, WBCs, platelets, haemoglobin, haematocrit, anastomoses, end arteries, lymphatic return, and normal arterial pH range 7.35-7.45.
Check yourself: can you recognise when low haemoglobin and haematocrit point toward anaemia and when lymphatic failure contributes to oedema?
Source focus: blood as delivery system, heart as pump, what kidneys do.
Revise: pulmonary versus systemic circulation, SA node and AV node, ECG purpose, foramen ovale and ductus arteriosus in foetal circulation, GFR, renin, erythropoietin, and kidney control of pH, blood volume, and osmolality.
Check yourself: can you explain why the kidneys matter for both blood pressure and oxygen-carrying capacity?
Source focus: respiratory anatomy, breathing and respiration, gas exchange and transport.
Revise: upper versus lower respiratory tract, Boyle's law, anatomical dead space, mucociliary escalator, surfactant, external versus internal respiration, hypoxia, hypercapnia, and oxygen transport by haemoglobin.
Check yourself: can you connect breathing mechanics to alveolar gas exchange and then to tissue oxygen delivery?
Source focus: membranes and compartments, skin and tissue remodelling, chemical defence, immune defence, isolating, antibody barrier.
Revise: epithelial barriers, acid mantle, lysozyme, innate versus adaptive immunity, wound-healing stages, granuloma formation, vaccination, active versus passive immunity, and immunoglobulin classes including IgG and IgM.
Check yourself: can you explain how the body walls off persistent pathogens and how antibodies help neutralise or tag antigens?
Six links that allow infection to spread: infectious agent, reservoir, portal of exit, transmission, portal of entry, and susceptible host.
Gram-positive bacteria have thick peptidoglycan and stain purple; Gram-negative bacteria have a thin layer plus an outer membrane and stain pink.
Hemoglobin reflects oxygen-carrying protein in RBCs; hematocrit is the packed-cell percentage of blood volume. Both help assess anemia and hydration status.
The lymphatic system returns interstitial fluid, proteins, and absorbed fats to the circulation and helps filter pathogens through lymph nodes.
Arterial blood pH is normally maintained between 7.35 and 7.45 by chemical buffers, ventilation, and kidney regulation.
Before birth, the foramen ovale and ductus arteriosus divert blood away from the lungs; these shunts normally close after birth.
Healing proceeds through inflammation, proliferation or organization, and maturation or remodeling as tissue strength returns.
Antibodies include IgG, IgA, IgM, IgE, and IgD. IgG is the most abundant in serum, while IgM is prominent in agglutination and early responses.
Test your knowledge from Weeks 1-6 with a source-mapped review quiz that now includes blood tests, lymphatics, acid-base balance, foetal circulation, renal regulation, wound healing, isolation, and antibody classes.
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Take this review test to assess your understanding of Weeks 1-6 material. The questions now sample foundational source topics including chain of infection, Gram differences, blood interpretation, lymphatics, acid-base balance, foetal circulation, kidney hormones, and immunity.