Animal Tissues & Frog Anatomy — Clinical & Applied Connections — Summary

Atherosclerosis involves damage to the squamous (simple) endothelial lining of blood vessels, followed by infiltration of macrophages (connective tissue cells) and formation of fatty plaques.
Asthma results from hypertrophy of smooth muscle in bronchiolar walls, causing narrowing (bronchoconstriction); smooth muscle's involuntary nature means it cannot be controlled consciously.
Myocardial infarction (heart attack) destroys cardiac muscle cells. Because cardiac muscle is not significantly regenerative, lost tissue is replaced by fibrous scar tissue, reducing contractile efficiency.
Arrhythmias arise from disruption of intercalated disc gap junctions, breaking the synchronized spread of electrical impulses across the myocardium.
Tendons and ligaments are both dense regular connective tissue. Tendon injuries (e.g., Achilles tendon rupture) disconnect skeletal muscle from bone; ligament injuries (e.g., ACL tear) destabilize bone-to-bone joints. Slow healing is due to poor vascularity in both tissues.
Osteoporosis reflects loss of bone matrix (calcium phosphate), weakening the Haversian system and increasing fracture risk — directly connected to the bone tissue structure studied in this session.
Intervertebral disc herniation involves fibrocartilage (a specialized cartilage type in intervertebral discs) bulging and pressing on spinal nerves, causing pain.
Goblet cell hyperplasia occurs in chronic airway inflammation (e.g., chronic bronchitis), producing excess mucus — directly connected to the glandular epithelium concept.
Spinal cord injury results in permanent neural deficits because mature neurons have extremely limited regenerative capacity — a direct implication of the neural tissue studied here.
Edema (tissue swelling) occurs when fluid accumulates in the semi-fluid matrix of areolar (loose connective) tissue — the most common site of inflammatory fluid accumulation.