Biological Science Important Diagrams
Must-draw labelled diagrams for AP SSC Class 10 Biological Science — with required labels and exam tips for each. Draw and label all of these before your BSE AP General Science Paper II exam.
Human Heart
Very HighCh. 5 — Life Processes
Required Labels:
Drawing Tip:
Draw two sides clearly (right = deoxygenated, left = oxygenated). Label all 4 chambers and at least 4 vessels. Show the septum dividing the two sides. Arrows showing direction of blood flow earn extra marks.
Human Respiratory System
HighCh. 5 — Life Processes
Required Labels:
Drawing Tip:
Show the trachea branching into two bronchi, then into bronchioles and alveoli. Draw a magnified alveolus with capillaries to show gas exchange. Label diaphragm clearly.
Nephron (Kidney Tubule)
HighCh. 5 — Life Processes
Required Labels:
Drawing Tip:
Show the three processes with arrows: (1) filtration at Bowman's capsule, (2) reabsorption along PCT and loop, (3) secretion into DCT. Label the blood vessels entering and leaving the glomerulus.
Neuron (Nerve Cell)
Very HighCh. 6 — Control and Coordination
Required Labels:
Drawing Tip:
Draw dendrites at one end (multiple, short branches), cell body with nucleus, and a long axon at the other end. Show myelin sheath around the axon with nodes of Ranvier. Include arrow showing direction of impulse (dendrite → cell body → axon).
Reflex Arc
HighCh. 6 — Control and Coordination
Required Labels:
Drawing Tip:
Draw a simple arc from skin (receptor) through the spinal cord to the muscle (effector). Show three neurons clearly. Label the synapse between neurons. Note: signal goes TO the spinal cord via sensory neuron, back FROM spinal cord via motor neuron.
Longitudinal Section of a Flower
HighCh. 7 — How Do Organisms Reproduce?
Required Labels:
Drawing Tip:
Draw the flower cut in half to show internal parts. Label the stamen (male: anther on filament) and pistil (female: stigma + style + ovary). Show ovules inside the ovary. Mark pollen on the anther.
Male Human Reproductive System
MediumCh. 7 — How Do Organisms Reproduce?
Required Labels:
Drawing Tip:
Show testis inside scrotum (outside body for lower temperature needed for sperm). Trace the path of sperm: testis → epididymis → vas deferens → urethra → penis. Label glands that add secretions along the way.
Female Human Reproductive System
MediumCh. 7 — How Do Organisms Reproduce?
Required Labels:
Drawing Tip:
Show both ovaries connected via fallopian tubes to the uterus. Label fimbriae at the mouth of the fallopian tube (funnel-shaped). Mark the site of fertilisation (fallopian tube) and site of implantation (uterus wall/endometrium).