Human Body Systems and Homeostasis

Human Body Systems & Tissues - Exam Revision Sheet

1. 📌 Essentials

• The human body maintains homeostasis through integrated systems involving specialized tissues.
• Epithelial tissue lines organs and vessels, facilitating exchange, absorption, and secretion. Connective tissue provides support, protection, and transport (e.g., blood, cartilage, bone).
• Muscle tissue enables movement and pumping (skeletal, cardiac, smooth).
• Nervous tissue transmits signals for control and coordination.
• Feedback mechanisms (negative/) regulate temperature, pH, blood pressure, etc.
• Blood vessels are lined with epithelial tissue; vasodilation/vasoconstriction regulate temperature.
• Cellular respiration occurs in mitochondria, producing energy, CO₂, and water.
• Bones undergo remodeling via osteoblasts and osteoclasts, influenced by hormones.
• The lymphatic and immune systems work together to defend against pathogens.

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