Your heart starts with a single cell that learns to beat. What you’re seeing This video shows a stem cell transforming into a heart muscle cell, or cardiomyocyte. As it develops, the cell organizes its internal scaffolding, forms contractile fibers called sarcomeres, and begins to beat in rhythmic pulses. 🟡 Builds the muscle filaments that give the heart its strength and structure 🟡 Produces electrical signals that trigger coordinated contractions 🟡 Demonstrates how living cells organize them

✨ In which week can the fetus move its limbs? | Fetal Development 💞 . . Fetal development is a fascinating process that occurs in three main stages: germinal, embryonic, and fetal. Here’s a brief overview of each stage: 1. Germinal Stage (Weeks 1-2) Fertilization: The sperm and egg unite to form a zygote. Cell Division: The zygote undergoes rapid cell division as it travels down the fallopian tube. Implantation: The blastocyst implants itself into the uterine wall. 2. Embryonic Stage (Weeks 3-8