The anatomical structure of green peas, also known as garden peas (Pisum sativum), consists of several distinct parts. Here's a breakdown of the internal and external morphology of green peas:
External Structure
1. Pod: The pod is the outer, green, and slightly fuzzy covering that contains the peas. It's a type of fruit known as a dehiscent pod, meaning it splits open to release the seeds.
2. Stem: The stem, also known as the peduncle, attaches the pod to the plant.
3. Calix: The calix, or flower bud, is the small, leaf-like structure that covers the pod.
Internal Structure
1. Seeds: The seeds, also known as peas, are the edible, round or oval-shaped structures inside the pod. They're actually the plant's reproductive structures, containing the embryo and nutrients.
2. Seed Coat: The seed coat, or testa, is the thin, outer layer of the seed.
3. Cotyledons: The cotyledons, or seed leaves, are the two small, round leaves inside the seed that provide nutrients to the developing plant.
4. Embryo: The embryo is the tiny, immature plant inside the seed, consisting of the radicle (primary root), hypocotyl (stem), and cotyledons.
5. Endosperm: The endosperm is the starchy, nutrient-rich tissue surrounding the embryo, providing food for the developing plant.
Other Structures
1. Hilum: The hilum is the small, scar-like structure on the seed where it attaches to the pod.
2. Raphe: The raphe is the ridge or seam on the seed where the two halves of the seed coat meet.
Understanding the anatomical structure of green peas can help you appreciate the intricate details of these delicious and nutritious legumes!
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