13: Human Biology Last updated Jan 11, 2021 Save as PDF 12.33: Fish Evolution and Ecology 13.1: Muscle Contraction Page ID311 ( \newcommand{\kernel}{\mathrm{null}\,}\) 13.1: Muscle Contraction13.2: Skin13.3: Nails and Hair13.4: Neuron13.5: Nerve Impulse13.6: Central Nervous System13.7: Peripheral Nervous System13.8: Senses13.9: Drugs and the Nervous System13.10: Nervous System Diseases13.11: Human Body13.12: Endocrine Glands13.13: Hormone13.14: Hormone Regulation13.15: Endocrine System Diseases13.16: Heart13.17: Blood Vessels13.18: Circulatory System13.19: Cardiovascular Diseases13.20: Blood13.21: Respiratory System13.22: Homeostasis13.23: Respiratory System Organs13.24: Breathing13.25: Regulation of Breathing13.26: Respiratory System Disorders13.27: Digestive System Organs13.28: Digestive System13.29: Small Intestine13.30: Large Intestine13.31: Digestive System Diseases13.32: Food and Nutrients13.33: Skeletal System13.34: Balanced Eating13.35: Excretory System13.36: Urinary System13.37: Kidneys13.38: Excretory System Diseases13.39: Innate Immune System13.40: Inflammatory Response13.41: Lymphatic System13.42: Humoral Response13.43: Cell-Mediated Response13.44: Bones13.45: Immunity13.46: Allergies13.47: Autoimmune Disease13.48: Immunodeficiency13.49: HIV AIDS13.50: Carcinogens and Cancer13.51: Air Pollution and Illness13.52: Bioterrorism13.53: Male Reproductive Organs13.54: Male Reproductive Development13.55: Bone Growth13.56: Sperm13.57: Female Reproductive Organs13.58: Female Reproductive Development13.59: Egg Cells13.60: Menstrual Cycle13.61: Fertilization13.62: Embryo Growth13.63: Prenatal Development13.64: The Placenta13.65: Pregnancy13.66: Joints13.67: Birth to Adulthood13.68: Adulthood13.69: STIs13.70: Bacterial STIs13.71: Viral STIs13.72: Skeletal Diseases13.73: Muscles13.74: Skeletal Muscles