Biology teacher

 - Dr.Sanjaykumar Pawar   90 NEET Biology MCQs booklet code 80,2026 with answers and explanations — covering Human Physiology, Genetics, Ecology, Botany and Zoology.  Internal Link Cell: The Unit of Life NEET Mock Test – 45 MCQs —  CBSE Class 11 Biology Notes: Introduction to Plant Physiology — anchor text: "revise Plant Physiology concepts" Small Molecular Weight Organic Compounds in Living Tissues (Biomolecules Notes) —  Biology MCQ - Questions 91 to 180 with Answers & Explanations Biology MCQ Set — Q.91 to Q.180 Complete questions with correct answers and explanations Jump to question: 91 · 92 · 93 · 94 · 95 · 96 · 97 · 98 · 99 · 100 · 101 · 102 · 103 · 104 · 105 · 106 · 107 · 108 · 109 · 110 · 111 · 112 · 113 · 114 · 115 · 116 · 117 · 118 · 119 · 120 · 121 · 122 · 123 · 124 · 125 · 126 · 127 · 128 · 129 · 130 · 131 · 132 · 133 · 134 · 135 · 136 · 137 · 138 · 139 · 140 · 141...

  19.2.9 Testis — Easy NEET Notes  - Dr.Sanjaykumar pawar Location of Testis Testes are present in the scrotal sac . The scrotal sac lies outside the abdomen in males. Lower temperature in the scrotum helps in sperm formation . Important Point Testis acts as: Primary sex organ → produces sperm Endocrine gland → secretes hormones Structure of Testis 1. Seminiferous Tubules Coiled tube-like structures inside testis. Main site of spermatogenesis (formation of sperms). 2. Stromal / Interstitial Tissue Tissue present between seminiferous tubules. Contains Leydig cells . Leydig Cells (Interstitial Cells) Found in intertubular spaces. Produce male sex hormones called androgens . Main androgen = Testosterone . NEET Fact LH hormone from pituitary stimulates Leydig cells to produce testosterone. Functions of Androgens (Testosterone) 1. Development of Male Reproductive Organs Androgens help in growth and maturation of: Epididymis Vas defere...