O EGG a female insect lays eggs. These eggs are often covered by an egg case which protects the eggs and holds them together
• EGG • A female insect lays eggs. These eggs are often covered by an egg case which protects the eggs and holds them together
· NYMPH nymphs The eggs hatch into nymphs Nymphs looks like small adults but usually don 't have WIngs. Insect nymphs eat the same food that the adult insect eats Nymphs shed or molt their exoskeletons (outer casings made up of a hard substance called chitin) and replace hem with larger ones several times as they grow Most nymphs molt 4-8 times
• NYMPH • The eggs hatch into nymphs. • Nymphs looks like small adults, but usually don't have wings. • Insect nymphs eat the same food that the adult insect eats. • Nymphs shed or molt their exoskeletons (outer casings made up of a hard substance called chitin) and replace them with larger ones several times as they grow. • Most nymphs molt 4-8 times
O ADULt nymphs The insects stop molting when they reach their adult size. By this time hey have also grown wings
• ADULT • The insects stop molting when they reach their adult size. By this time, they have also grown wings
ENDOCRINE- describing or relating to any gland or other group of cells that synthesizes hormones and secretes them directly into the blood, lymph or other intercellular fluid Endocrine cells release (A) ENDOCRINE protein and non-protein endocrine cell receptor hormones hormone Synthesis of hormones is orchestrated by the cns Hormones effects are bloodstream tissue dependent target cell
Endocrine cells release protein and non-protein hormones Synthesis of hormones is orchestrated by the CNS Hormones effects are tissue dependent ENDOCRINE- describing or relating to any gland or other group of cells that synthesizes hormones and secretes them directly into the blood, lymph, or other intercellular fluid
Hormonal Control of Insect Metamorphosis emperature Brain Prothoracicotropic促前 Light, Stress, etc 胸腺 hormone(PTTH) opus Allatum咽侧体 Prothoracic Gland前腺 Juvenile Ecdysteroid蜕皮 Hormone(JH)保 激素 成素 Adult upa
Hormonal Control of Insect Metamorphosis Brain Temperature, Light, Stress, etc. Prothoracic Gland前胸腺 Ecdysteroid蜕皮 激素 Corpus Allatum咽侧体 Prothoracicotropic促前 胸腺hormone (PTTH) Juvenile Hormone (JH)保 幼激素 Larva Pupa Adult