Retro anatomy book

I have a small collection of mid-century science books for young adults, and one of my favorites is The Human Body: What It Is and How It Works. Published in 1959, this beautifully illustrated book describes how our muscular, reproductive, digestive, endocrine, respiratory, skeletal, nervous, and circulatory systems work in simple English. Out of print but inexpensive used copies are easily found online. — MF