Confusion between Tenancy by the Entirety and Joint Tenancy

Yaar samajh nahi aaya! I'm studying for MH CET Law and Property is giving me a headache. There's this Tenancy by the Entirety (TBE) and Joint Tenancy that seems to be similar, but I'm getting confused. In TBE, husband and wife together own the property and it can't be sold or transferred without the consent of both. Sounds like Joint Tenancy, where two or more people own the property together, but I'm not sure. But isn't Joint Tenancy a bit like Co-Ownership? And what's the difference between Seisin and Possession in the context of Joint Tenancy? I mean, I've read the Bare Acts, but yaar, it's not clicking. Anyone can help me understand the difference between these two concepts? Please help!