Biology · Class 11 · Chapter 7
Structural Organisation in Animals
11 lessons 79 min 2 simulations
This chapter shows how the cells of a multicellular animal share the work: cells form tissues, tissues build organs and organs team up as organ systems. It then studies one vertebrate in detail, the frog (Rana tigrina), system by system: its external form and its digestive, respiratory, circulatory, excretory, nervous, endocrine, sensory and reproductive organs. It sets up the human physiology chapters that follow.
What the exam asks
NEET asks one-line facts about the frog: the digits on each limb, the marks of a male, the respiratory organs in water and on land, the three-chambered heart with sinus venosus and conus arteriosus, the two portal systems, nucleated RBCs, ureotelism, the urinogenital duct of the male, the ten pairs of cranial nerves and the 2500 to 3000 ova a female lays. Marks are lost by swapping the digit counts, by giving the female a urinogenital duct and by forgetting that the skin is the only respiratory organ during aestivation and hibernation.
Lessons
11 lessons · 79 min
1Tissues, organs and organ systemsNCERT §7.17 min2The frog and its way of lifeNCERT §7.25 min3External features of the frogNCERT §7.2.16 min4Digestive systemNCERT §7.2.26 min5RespirationNCERT §7.2.210 min 1 sim6Circulation, blood and lymphNCERT §7.2.26 min7Excretory systemNCERT §7.2.26 min8Nervous and endocrine controlNCERT §7.2.26 min9Sense organsNCERT §7.2.25 min10Reproduction and developmentNCERT §7.2.210 min 1 sim11Chapter reviewMust-know facts, traps and formulas12 min